diff --git a/DESIGN.md b/DESIGN.md
index 9223b6e..9dfd5ac 100644
--- a/DESIGN.md
+++ b/DESIGN.md
@@ -465,10 +465,13 @@
 ### 喜欢的环境
 
 - 名称
+- Description：可为空，用于解释该 Ideal Habitat 对 Pokemon 栖息地选择的意义
+- Opposite：可为空，关联另一个喜欢的环境作为反义关系
 
 ### 喜欢的东西 / 标签
 
 - 名称
+- Opposite：可为空，关联另一个喜欢的东西 / 标签作为反义关系
 - 同时用于：
   - Pokemon 喜欢的东西
   - 物品标签
@@ -588,19 +591,17 @@ Pokemon 列表功能：
 Pokemon 详情页展示：
 
 - 基本信息
-- 详情主内容在六维 Stats 右侧始终保留正方形图片区；已配置图片时展示居中的 Pokédex 风格图片，未配置图片时展示默认 Poké Ball 占位符；页面内不直接展示图片版本、状态或描述，用户可通过图片 Modal 查看详情。
-- 主内容顶部按以下布局展示：
-  - 左上：Genus & Details；无区块标题；如有 Genus，先展示 Genus，再以分割线连接 Details 内容
-  - 左下：Height / Weight 与 Types 按 2:1 比例并排；Height / Weight 无区块标题，在 Dimension 区内左右并排展示并以中间分割线隔开，每组按英制、分割线、公制、标签上下排列；Types 不显示 Type 1 / Type 2 文案，上下布局并居中展示
-  - 右侧：六维 Stats；图片或默认占位符展示在 Stats 右侧
-- 六维使用 ProgressBar 展示，最大值按 150 计算。
-- 特长
+- 标题区不展示 Ideal Habitat；Ideal Habitat 属于正文核心资料。
+- 详情主内容顶部改为左侧 Pokemon 图片、右侧 Pokemon Description；已配置图片时展示居中的 Pokédex 风格图片，未配置图片时展示默认 Poké Ball 占位符；页面内不直接展示图片版本、状态或描述，用户可通过图片 Modal 查看详情。
+- 详情页需要突出 Pokopia 机制核心要素：
+  - Skills：影响栖息地选择、物品掉落和 Trading 行为
+  - Ideal Habitat：影响栖息地选择和相关 Pokemon 对比；正文中展示名称、Description 和可选 Opposite
+  - Favourite Things：影响物品掉落、隐藏标签判断和 Trading 价格证据；正文中展示名称和可选 Opposite
 - 特长掉落物品：当该 Pokemon 拥有支持掉落物的已选特长时默认展示；已配置时展示掉落物品图标，未配置时展示空状态
 - Trading：当该 Pokemon 拥有支持 Trading 的已选特长时默认展示；分 Likes 与 Neutral 两组展示物品，Likes 表示交易价格 1.5x，Neutral 表示无加成，未配置观察时展示空状态；详情页双列列表高度受限，内容较多时每列内部独立滚动，避免 Section 被大量物品无限拉长
 - Trading 可在详情页通过 Manage Trading Modal 维护；Modal 左侧顶部为同一行搜索框和分类下拉筛选，下面提供 Likes / Neutral 默认加入目标切换；搜索结果优先展示名称精确匹配、名称开头匹配和单词匹配的物品，再展示名称包含、分类或用途包含的物品；搜索框支持上下键切换当前结果、左右键切换默认加入组、Enter 将当前结果加入默认目标组；从左侧选择物品会加入当前默认目标组，右侧按 Likes / Neutral 分组展示已选物品，并可切换分组或移除；列表区域高度稳定，过滤结果减少时 Modal 不应抖动
-- 喜欢的环境
-- 喜欢的东西
-- 相关 Pokemon：与关联喜欢的东西的物品在桌面端左右并排展示；按相同喜欢的环境优先，其次按共同喜欢的东西数量从多到少排序；支持按喜欢的环境筛选，默认筛选当前 Pokemon 的喜欢的环境，也可切换到其他喜欢的环境或全部；每个筛选视图最多展示 6 个；每项左侧展示 Pokemon 图片或默认 Poké Ball 占位符，原列表项信息布局保持不变，第一行左侧展示名称，右侧展示特长和喜欢的环境，第二行展示喜欢的东西，并高亮共同喜欢的东西
+- 参考资料 Tab：Height / Weight、Types 和六维 Stats 移到独立 Tab；该 Tab 必须注明这些数据只是参考 Pokédex 的展示设计，不属于 Pokopia 机制；六维使用 ProgressBar 展示，最大值按 150 计算
+- 相关 Pokemon：与关联喜欢的东西的物品在桌面端左右并排展示；按相同喜欢的环境优先，其次按共同喜欢的东西数量从多到少排序；支持按喜欢的环境筛选，默认筛选当前 Pokemon 的喜欢的环境，也可切换到其他喜欢的环境或全部；每个筛选视图最多展示 6 个；每项左侧展示 Pokemon 图片或默认 Poké Ball 占位符，原列表项信息布局保持不变，第一行左侧展示名称，右侧展示特长和喜欢的环境，第二行展示喜欢的东西，并高亮共同喜欢的东西；当相关 Pokemon 的 Ideal Habitat 或 Favourite Things 与当前 Pokemon 配置的 Opposite 反义关系命中时，使用红色标记并展示 Opposite 文案，不能只依赖颜色表达
 - 关联喜欢的东西的物品：与相关 Pokemon 在桌面端左右并排展示；每项展示物品图标，未配置图标时显示默认物品标记占位符
 - 出现的栖息地：每行左侧展示栖息地图片，未配置图片时显示默认栖息地标记占位符
 - 最后编辑信息
diff --git a/backend/db/schema.sql b/backend/db/schema.sql
index 5f85cd2..67fb1aa 100644
--- a/backend/db/schema.sql
+++ b/backend/db/schema.sql
@@ -109,11 +109,14 @@ CREATE INDEX IF NOT EXISTS user_follows_followed_created_idx
 CREATE TABLE IF NOT EXISTS environments (
   id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
   name text NOT NULL UNIQUE,
+  description text NOT NULL DEFAULT '',
+  opposite_environment_id integer REFERENCES environments(id) ON DELETE SET NULL,
   sort_order integer NOT NULL DEFAULT 0 CHECK (sort_order >= 0),
   created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL,
   updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL,
   created_at timestamptz NOT NULL DEFAULT now(),
-  updated_at timestamptz NOT NULL DEFAULT now()
+  updated_at timestamptz NOT NULL DEFAULT now(),
+  CHECK (opposite_environment_id IS NULL OR opposite_environment_id <> id)
 );
 
 CREATE TABLE IF NOT EXISTS roles (
@@ -1071,11 +1074,13 @@ CREATE TABLE IF NOT EXISTS skills (
 CREATE TABLE IF NOT EXISTS favorite_things (
   id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
   name text NOT NULL UNIQUE,
+  opposite_favorite_thing_id integer REFERENCES favorite_things(id) ON DELETE SET NULL,
   sort_order integer NOT NULL DEFAULT 0 CHECK (sort_order >= 0),
   created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL,
   updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL,
   created_at timestamptz NOT NULL DEFAULT now(),
-  updated_at timestamptz NOT NULL DEFAULT now()
+  updated_at timestamptz NOT NULL DEFAULT now(),
+  CHECK (opposite_favorite_thing_id IS NULL OR opposite_favorite_thing_id <> id)
 );
 
 CREATE TABLE IF NOT EXISTS pokemon_types (
@@ -1526,6 +1531,50 @@ ALTER TABLE skills
 ALTER TABLE items
   ADD COLUMN IF NOT EXISTS dyeability integer NOT NULL DEFAULT 0 CHECK (dyeability IN (0, 1, 2, 3));
 
+ALTER TABLE environments
+  ADD COLUMN IF NOT EXISTS description text NOT NULL DEFAULT '';
+
+ALTER TABLE environments
+  ADD COLUMN IF NOT EXISTS opposite_environment_id integer;
+
+ALTER TABLE favorite_things
+  ADD COLUMN IF NOT EXISTS opposite_favorite_thing_id integer;
+
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_constraint WHERE conname = 'environments_opposite_environment_id_fkey'
+  ) THEN
+    ALTER TABLE environments
+      ADD CONSTRAINT environments_opposite_environment_id_fkey
+      FOREIGN KEY (opposite_environment_id) REFERENCES environments(id) ON DELETE SET NULL;
+  END IF;
+
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_constraint WHERE conname = 'environments_opposite_environment_id_check'
+  ) THEN
+    ALTER TABLE environments
+      ADD CONSTRAINT environments_opposite_environment_id_check
+      CHECK (opposite_environment_id IS NULL OR opposite_environment_id <> id);
+  END IF;
+
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_constraint WHERE conname = 'favorite_things_opposite_favorite_thing_id_fkey'
+  ) THEN
+    ALTER TABLE favorite_things
+      ADD CONSTRAINT favorite_things_opposite_favorite_thing_id_fkey
+      FOREIGN KEY (opposite_favorite_thing_id) REFERENCES favorite_things(id) ON DELETE SET NULL;
+  END IF;
+
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_constraint WHERE conname = 'favorite_things_opposite_favorite_thing_id_check'
+  ) THEN
+    ALTER TABLE favorite_things
+      ADD CONSTRAINT favorite_things_opposite_favorite_thing_id_check
+      CHECK (opposite_favorite_thing_id IS NULL OR opposite_favorite_thing_id <> id);
+  END IF;
+END $$;
+
 UPDATE items
 SET dyeability = CASE
   WHEN dual_dyeable THEN 2
diff --git a/backend/src/queries.ts b/backend/src/queries.ts
index 27a4b5b..fd2be93 100644
--- a/backend/src/queries.ts
+++ b/backend/src/queries.ts
@@ -157,6 +157,8 @@ type ConfigDefinition = {
   hasItemDrop?: boolean;
   hasTrading?: boolean;
   hasChangeLog?: boolean;
+  hasDescription?: boolean;
+  oppositeColumn?: string;
 };
 type SortableContentType = 'items' | 'ancient-artifacts' | 'recipes' | 'habitats';
 type SortableContentDefinition = {
@@ -656,6 +658,8 @@ type DailyChecklistChangeSource = {
 } & TranslationChangeSource;
 type ConfigChangeSource = {
   name: string;
+  description?: string;
+  opposite?: { name: string } | null;
   hasItemDrop?: boolean;
   hasTrading?: boolean;
   changeLog?: string;
@@ -722,8 +726,8 @@ const ancientArtifactCategoryOptions = [
 const configDefinitions: Record<ConfigType, ConfigDefinition> = {
   'pokemon-types': { table: 'pokemon_types', entityType: 'pokemon-types' },
   skills: { table: 'skills', entityType: 'skills', hasItemDrop: true, hasTrading: true },
-  environments: { table: 'environments', entityType: 'environments' },
-  'favorite-things': { table: 'favorite_things', entityType: 'favorite-things' },
+  environments: { table: 'environments', entityType: 'environments', hasDescription: true, oppositeColumn: 'opposite_environment_id' },
+  'favorite-things': { table: 'favorite_things', entityType: 'favorite-things', oppositeColumn: 'opposite_favorite_thing_id' },
   'acquisition-methods': { table: 'acquisition_methods', entityType: 'acquisition-methods' },
   maps: { table: 'maps', entityType: 'maps' },
   'game-versions': { table: 'game_versions', entityType: 'game-versions', hasChangeLog: true },
@@ -1108,8 +1112,22 @@ function configOrder(): string {
 
 function configSelect(definition: ConfigDefinition, locale: string): string {
   const name = localizedName(definition.entityType, 'c', locale);
+  const oppositeName = localizedName(definition.entityType, 'opposite_config', locale);
   const translations = translationsSelect(definition.entityType, 'c.id');
   const columns = [`c.id`, `${name} AS name`, `c.name AS "baseName"`, `${translations} AS translations`];
+  if (definition.hasDescription) {
+    columns.push(`c.description`);
+  }
+  if (definition.oppositeColumn) {
+    columns.push(
+      `
+        CASE
+          WHEN opposite_config.id IS NULL THEN NULL
+          ELSE json_build_object('id', opposite_config.id, 'name', ${oppositeName})
+        END AS opposite
+      `
+    );
+  }
   if (definition.hasItemDrop) {
     columns.push(`c.has_item_drop AS "hasItemDrop"`);
   }
@@ -1122,6 +1140,14 @@ function configSelect(definition: ConfigDefinition, locale: string): string {
   return columns.join(', ');
 }
 
+function configRelationJoins(definition: ConfigDefinition): string {
+  if (!definition.oppositeColumn) {
+    return '';
+  }
+
+  return `LEFT JOIN ${definition.table} opposite_config ON opposite_config.id = c.${definition.oppositeColumn}`;
+}
+
 function validationError(message: string): ValidationError {
   const error = new Error(message) as ValidationError;
   error.statusCode = 400;
@@ -2070,7 +2096,7 @@ async function ensurePokemonTypeCatalog(
       const changes = configEditChanges(
         { table: 'pokemon_types', entityType: 'pokemon-types' },
         existing.rows[0],
-        { name, translations, hasItemDrop: false, hasTrading: false, changeLog: '' }
+        { name, description: '', translations, oppositeName: '', hasItemDrop: false, hasTrading: false, changeLog: '' }
       );
       if (changes.length) {
         await client.query(
@@ -2636,7 +2662,9 @@ function configEditChanges(
   before: ConfigChangeSource,
   after: {
     name: string;
+    description: string;
     translations: TranslationInput;
+    oppositeName: string;
     hasItemDrop: boolean;
     hasTrading: boolean;
     changeLog: string;
@@ -2645,6 +2673,12 @@ function configEditChanges(
   const changes: EditChange[] = [];
   pushChange(changes, 'Name', before.name, after.name);
   pushTranslationChanges(changes, before.translations, after.translations, ['name']);
+  if (definition.hasDescription) {
+    pushChange(changes, 'Description', before.description, after.description);
+  }
+  if (definition.oppositeColumn) {
+    pushChange(changes, 'Opposite', before.opposite?.name ?? '', after.oppositeName);
+  }
   if (definition.hasItemDrop) {
     pushChange(changes, 'Has item drop', boolValue(Boolean(before.hasItemDrop)), boolValue(after.hasItemDrop));
   }
@@ -2684,8 +2718,10 @@ function pokemonProjection(locale: string): string {
   const pokemonDetails = localizedField('pokemon', 'p.id', 'p.details', 'details', locale);
   const typeName = localizedName('pokemon-types', 'pt', locale);
   const environmentName = localizedName('environments', 'e', locale);
+  const environmentOppositeName = localizedName('environments', 'environment_opposite', locale);
   const skillName = localizedName('skills', 's', locale);
   const favoriteThingName = localizedName('favorite-things', 'ft', locale);
+  const favoriteThingOppositeName = localizedName('favorite-things', 'opposite_ft', locale);
 
   return `
     SELECT
@@ -2715,7 +2751,16 @@ function pokemonProjection(locale: string): string {
       ) AS stats,
       ${translationsSelect('pokemon', 'p.id')} AS translations,
       ${auditSelect('p', 'pokemon_created_user', 'pokemon_updated_user')},
-      json_build_object('id', e.id, 'name', ${environmentName}) AS environment,
+      json_build_object(
+        'id', e.id,
+        'name', ${environmentName},
+        'description', e.description,
+        'opposite',
+        CASE
+          WHEN environment_opposite.id IS NULL THEN NULL
+          ELSE json_build_object('id', environment_opposite.id, 'name', ${environmentOppositeName})
+        END
+      ) AS environment,
       COALESCE((
         SELECT json_agg(json_build_object('id', pt.id, 'name', ${typeName}) ORDER BY ppt.slot_order)
         FROM pokemon_pokemon_types ppt
@@ -2729,13 +2774,26 @@ function pokemonProjection(locale: string): string {
         WHERE ps.pokemon_id = p.id
       ), '[]'::json) AS skills,
       COALESCE((
-        SELECT json_agg(json_build_object('id', ft.id, 'name', ${favoriteThingName}) ORDER BY ${orderByEntity('ft')})
+        SELECT json_agg(
+          json_build_object(
+            'id', ft.id,
+            'name', ${favoriteThingName},
+            'opposite',
+            CASE
+              WHEN opposite_ft.id IS NULL THEN NULL
+              ELSE json_build_object('id', opposite_ft.id, 'name', ${favoriteThingOppositeName})
+            END
+          )
+          ORDER BY ${orderByEntity('ft')}
+        )
         FROM pokemon_favorite_things pft
         JOIN favorite_things ft ON ft.id = pft.favorite_thing_id
+        LEFT JOIN favorite_things opposite_ft ON opposite_ft.id = ft.opposite_favorite_thing_id
         WHERE pft.pokemon_id = p.id
       ), '[]'::json) AS favorite_things
     FROM pokemon p
     JOIN environments e ON e.id = p.environment_id
+    LEFT JOIN environments environment_opposite ON environment_opposite.id = e.opposite_environment_id
     ${auditJoins('p', 'pokemon_created_user', 'pokemon_updated_user')}
   `;
 }
@@ -5363,6 +5421,7 @@ export async function listConfig(type: ConfigType, locale = defaultLocale) {
     `
       SELECT ${configSelect(definition, locale)}, ${auditSelect('c')}
       FROM ${definition.table} c
+      ${configRelationJoins(definition)}
       ${auditJoins('c')}
       ORDER BY ${configOrder()}
     `
@@ -5375,6 +5434,7 @@ async function getConfigById(type: ConfigType, id: number, locale = defaultLocal
     `
       SELECT ${configSelect(definition, locale)}, ${auditSelect('c')}
       FROM ${definition.table} c
+      ${configRelationJoins(definition)}
       ${auditJoins('c')}
       WHERE c.id = $1
     `,
@@ -5386,6 +5446,8 @@ export async function createConfig(type: ConfigType, payload: Record<string, unk
   const definition = configDefinitions[type];
   const name = cleanName(payload.name);
   const translations = cleanTranslations(payload.translations, ['name']);
+  const description = definition.hasDescription ? cleanOptionalText(payload.description) : '';
+  const oppositeId = definition.oppositeColumn ? cleanOptionalPositiveInteger(payload.oppositeId) : null;
   const hasItemDrop = definition.hasItemDrop ? Boolean(payload.hasItemDrop) : false;
   const hasTrading = definition.hasTrading ? Boolean(payload.hasTrading) : false;
   const changeLog = definition.hasChangeLog ? cleanOptionalText(payload.changeLog) : '';
@@ -5394,6 +5456,14 @@ export async function createConfig(type: ConfigType, payload: Record<string, unk
     const sortOrder = await nextSortOrder(client, definition.table);
     const columns = ['name'];
     const values: unknown[] = [name];
+    if (definition.hasDescription) {
+      columns.push('description');
+      values.push(description);
+    }
+    if (definition.oppositeColumn) {
+      columns.push(definition.oppositeColumn);
+      values.push(oppositeId);
+    }
     if (definition.hasItemDrop) {
       columns.push('has_item_drop');
       values.push(hasItemDrop);
@@ -5451,14 +5521,28 @@ export async function updateConfig(
   const definition = configDefinitions[type];
   const name = cleanName(payload.name);
   const translations = cleanTranslations(payload.translations, ['name']);
+  const description = definition.hasDescription ? cleanOptionalText(payload.description) : '';
+  const oppositeId = definition.oppositeColumn ? cleanOptionalPositiveInteger(payload.oppositeId) : null;
   const hasItemDrop = definition.hasItemDrop ? Boolean(payload.hasItemDrop) : false;
   const hasTrading = definition.hasTrading ? Boolean(payload.hasTrading) : false;
   const changeLog = definition.hasChangeLog ? cleanOptionalText(payload.changeLog) : '';
   const before = await getConfigById(type, id, defaultLocale);
 
+  if (oppositeId === id) {
+    throw validationError('server.validation.invalidField');
+  }
+
   const updated = await withTransaction(async (client) => {
     const assignments = ['name = $1'];
     const values: unknown[] = [name];
+    if (definition.hasDescription) {
+      values.push(description);
+      assignments.push(`description = $${values.length}`);
+    }
+    if (definition.oppositeColumn) {
+      values.push(oppositeId);
+      assignments.push(`${definition.oppositeColumn} = $${values.length}`);
+    }
     if (definition.hasItemDrop) {
       values.push(hasItemDrop);
       assignments.push(`has_item_drop = $${values.length}`);
@@ -5513,8 +5597,17 @@ export async function updateConfig(
     }
 
     await replaceEntityTranslations(client, definition.entityType, id, translations, ['name']);
+    const oppositeNames = definition.oppositeColumn && oppositeId ? await entityNameMap(client, definition.table, [oppositeId]) : new Map<number, string>();
     const changes = before
-      ? configEditChanges(definition, before as ConfigChangeSource, { name, translations, hasItemDrop, hasTrading, changeLog })
+      ? configEditChanges(definition, before as ConfigChangeSource, {
+          name,
+          description,
+          translations,
+          oppositeName: oppositeId ? oppositeNames.get(oppositeId) ?? '' : '',
+          hasItemDrop,
+          hasTrading,
+          changeLog
+        })
       : [];
     await recordEditLog(client, type, id, 'update', userId, changes);
     return true;
@@ -5637,6 +5730,7 @@ export async function getPokemon(id: number, locale = defaultLocale) {
   const relatedEnvironmentName = localizedName('environments', 'related_environment', locale);
   const relatedSkillName = localizedName('skills', 'related_skill', locale);
   const relatedFavoriteThingName = localizedName('favorite-things', 'related_favorite_thing', locale);
+  const relatedFavoriteThingOppositeName = localizedName('favorite-things', 'related_favorite_thing_opposite', locale);
   const tradingItemName = localizedName('items', 'trading_item', locale);
 
   const [habitats, itemDrops, favoriteThingItems, tradingItems, relatedPokemon, editHistory, imageHistory] = await Promise.all([
@@ -5718,24 +5812,56 @@ export async function getPokemon(id: number, locale = defaultLocale) {
           WHERE p.id = $1
         ),
         current_favourites AS (
-          SELECT pft.favorite_thing_id
+          SELECT
+            pft.favorite_thing_id,
+            ft.opposite_favorite_thing_id
           FROM pokemon_favorite_things pft
+          JOIN favorite_things ft ON ft.id = pft.favorite_thing_id
           WHERE pft.pokemon_id = $1
         ),
         scored_pokemon AS (
           SELECT
             related_pokemon.id,
             (related_pokemon.environment_id = current_pokemon.environment_id) AS "environmentMatches",
-            COUNT(current_favourites.favorite_thing_id)::integer AS "favoriteThingMatchCount"
+            (
+              related_pokemon.environment_id = current_environment.opposite_environment_id
+              OR related_environment.opposite_environment_id = current_pokemon.environment_id
+            ) AS "environmentIsOpposite",
+            COUNT(current_favourites.favorite_thing_id) FILTER (
+              WHERE current_favourites.favorite_thing_id = related_pokemon_favourite.favorite_thing_id
+            )::integer AS "favoriteThingMatchCount",
+            COUNT(current_favourites.favorite_thing_id) FILTER (
+              WHERE current_favourites.opposite_favorite_thing_id = related_pokemon_favourite.favorite_thing_id
+                 OR related_favorite_thing.opposite_favorite_thing_id = current_favourites.favorite_thing_id
+            )::integer AS "favoriteThingOppositeCount"
           FROM current_pokemon
+          JOIN environments current_environment ON current_environment.id = current_pokemon.environment_id
           JOIN pokemon related_pokemon ON related_pokemon.id <> current_pokemon.id
+          JOIN environments related_environment ON related_environment.id = related_pokemon.environment_id
           LEFT JOIN pokemon_favorite_things related_pokemon_favourite
             ON related_pokemon_favourite.pokemon_id = related_pokemon.id
+          LEFT JOIN favorite_things related_favorite_thing
+            ON related_favorite_thing.id = related_pokemon_favourite.favorite_thing_id
           LEFT JOIN current_favourites
             ON current_favourites.favorite_thing_id = related_pokemon_favourite.favorite_thing_id
-          GROUP BY related_pokemon.id, related_pokemon.environment_id, current_pokemon.environment_id
+            OR current_favourites.opposite_favorite_thing_id = related_pokemon_favourite.favorite_thing_id
+            OR related_favorite_thing.opposite_favorite_thing_id = current_favourites.favorite_thing_id
+          GROUP BY
+            related_pokemon.id,
+            related_pokemon.environment_id,
+            related_environment.opposite_environment_id,
+            current_pokemon.environment_id,
+            current_environment.opposite_environment_id
           HAVING related_pokemon.environment_id = current_pokemon.environment_id
-            OR COUNT(current_favourites.favorite_thing_id) > 0
+            OR related_pokemon.environment_id = current_environment.opposite_environment_id
+            OR related_environment.opposite_environment_id = current_pokemon.environment_id
+            OR COUNT(current_favourites.favorite_thing_id) FILTER (
+              WHERE current_favourites.favorite_thing_id = related_pokemon_favourite.favorite_thing_id
+            ) > 0
+            OR COUNT(current_favourites.favorite_thing_id) FILTER (
+              WHERE current_favourites.opposite_favorite_thing_id = related_pokemon_favourite.favorite_thing_id
+                 OR related_favorite_thing.opposite_favorite_thing_id = current_favourites.favorite_thing_id
+            ) > 0
         )
         SELECT
           related_pokemon.id,
@@ -5743,7 +5869,12 @@ export async function getPokemon(id: number, locale = defaultLocale) {
           ${relatedPokemonName} AS name,
           related_pokemon.is_event_item AS "isEventItem",
           ${pokemonImageJson('related_pokemon')} AS image,
-          json_build_object('id', related_environment.id, 'name', ${relatedEnvironmentName}) AS environment,
+          json_build_object(
+            'id', related_environment.id,
+            'name', ${relatedEnvironmentName},
+            'matches', scored_pokemon."environmentMatches",
+            'isOpposite', scored_pokemon."environmentIsOpposite"
+          ) AS environment,
           COALESCE((
             SELECT json_agg(
               json_build_object(
@@ -5763,22 +5894,40 @@ export async function getPokemon(id: number, locale = defaultLocale) {
               json_build_object(
                 'id', related_favorite_thing.id,
                 'name', ${relatedFavoriteThingName},
+                'opposite',
+                CASE
+                  WHEN related_favorite_thing_opposite.id IS NULL THEN NULL
+                  ELSE json_build_object('id', related_favorite_thing_opposite.id, 'name', ${relatedFavoriteThingOppositeName})
+                END,
                 'matches', EXISTS (
                   SELECT 1
                   FROM current_favourites
                   WHERE current_favourites.favorite_thing_id = related_favorite_thing.id
+                ),
+                'isOpposite', EXISTS (
+                  SELECT 1
+                  FROM current_favourites
+                  WHERE current_favourites.opposite_favorite_thing_id = related_favorite_thing.id
+                     OR related_favorite_thing.opposite_favorite_thing_id = current_favourites.favorite_thing_id
                 )
               )
               ORDER BY ${orderByEntity('related_favorite_thing')}
             )
             FROM pokemon_favorite_things related_pokemon_favourite
             JOIN favorite_things related_favorite_thing ON related_favorite_thing.id = related_pokemon_favourite.favorite_thing_id
+            LEFT JOIN favorite_things related_favorite_thing_opposite
+              ON related_favorite_thing_opposite.id = related_favorite_thing.opposite_favorite_thing_id
             WHERE related_pokemon_favourite.pokemon_id = related_pokemon.id
           ), '[]'::json) AS favorite_things
         FROM scored_pokemon
         JOIN pokemon related_pokemon ON related_pokemon.id = scored_pokemon.id
         JOIN environments related_environment ON related_environment.id = related_pokemon.environment_id
-        ORDER BY scored_pokemon."environmentMatches" DESC, scored_pokemon."favoriteThingMatchCount" DESC, related_pokemon.id
+        ORDER BY
+          scored_pokemon."environmentMatches" DESC,
+          scored_pokemon."favoriteThingMatchCount" DESC,
+          scored_pokemon."environmentIsOpposite" DESC,
+          scored_pokemon."favoriteThingOppositeCount" DESC,
+          related_pokemon.id
       `,
       [id]
     ),
diff --git a/frontend/src/services/api.ts b/frontend/src/services/api.ts
index 5e80a76..0411338 100644
--- a/frontend/src/services/api.ts
+++ b/frontend/src/services/api.ts
@@ -71,6 +71,8 @@ export interface NamedEntity {
   id: number;
   name: string;
   baseName?: string;
+  description?: string;
+  opposite?: NamedEntity | null;
   translations?: TranslationMap;
 }
 
@@ -234,9 +236,9 @@ export interface RelatedPokemon {
   name: string;
   isEventItem: boolean;
   image?: PokemonImage | null;
-  environment: NamedEntity;
+  environment: NamedEntity & { matches?: boolean; isOpposite?: boolean };
   skills: Skill[];
-  favorite_things: Array<NamedEntity & { matches: boolean }>;
+  favorite_things: Array<NamedEntity & { matches: boolean; isOpposite?: boolean }>;
 }
 
 export interface PokemonDetail extends Pokemon {
@@ -1581,7 +1583,7 @@ export const api = {
   config: (type: ConfigType) => getJson<Array<Skill | GameVersion | NamedEntity>>(`/api/admin/config/${type}`),
   createConfig: (
     type: ConfigType,
-    payload: { name: string; translations?: TranslationMap; hasItemDrop?: boolean; hasTrading?: boolean; changeLog?: string }
+    payload: { name: string; translations?: TranslationMap; description?: string; oppositeId?: number | null; hasItemDrop?: boolean; hasTrading?: boolean; changeLog?: string }
   ) =>
     sendJson<Skill | GameVersion | NamedEntity>(`/api/admin/config/${type}`, 'POST', payload),
   reorderConfig: (type: ConfigType, ids: number[]) =>
@@ -1589,7 +1591,7 @@ export const api = {
   updateConfig: (
     type: ConfigType,
     id: number,
-    payload: { name: string; translations?: TranslationMap; hasItemDrop?: boolean; hasTrading?: boolean; changeLog?: string }
+    payload: { name: string; translations?: TranslationMap; description?: string; oppositeId?: number | null; hasItemDrop?: boolean; hasTrading?: boolean; changeLog?: string }
   ) =>
     sendJson<Skill | GameVersion | NamedEntity>(`/api/admin/config/${type}/${id}`, 'PUT', payload),
   deleteConfig: (type: ConfigType, id: number) => deleteJson(`/api/admin/config/${type}/${id}`),
diff --git a/frontend/src/styles/main.css b/frontend/src/styles/main.css
index c64d82f..384c919 100644
--- a/frontend/src/styles/main.css
+++ b/frontend/src/styles/main.css
@@ -5756,6 +5756,105 @@ button:disabled,
   color: var(--ink-soft);
 }
 
+.pokemon-description-grid {
+  display: grid;
+  grid-template-columns: minmax(220px, 340px) minmax(0, 1fr);
+  gap: 16px;
+  align-items: stretch;
+}
+
+.pokemon-description-image {
+  width: 100%;
+  min-height: 260px;
+  aspect-ratio: 1 / 1;
+  display: grid;
+  place-items: center;
+  padding: 14px;
+  overflow: hidden;
+  border: 3px solid var(--line-strong);
+  border-radius: var(--radius-card);
+  background:
+    linear-gradient(90deg, rgba(42, 117, 187, 0.08) 1px, transparent 1px) 0 0 / 18px 18px,
+    linear-gradient(rgba(42, 117, 187, 0.08) 1px, transparent 1px) 0 0 / 18px 18px,
+    #eef9ff;
+  box-shadow: var(--shadow-soft);
+  cursor: pointer;
+}
+
+.pokemon-description-image:not(.pokemon-description-image--placeholder) {
+  padding: 0;
+  border: 0;
+  background: transparent;
+  box-shadow: none;
+}
+
+.pokemon-description-image img {
+  width: 100%;
+  height: 100%;
+  object-fit: contain;
+}
+
+.pokemon-description-image--placeholder {
+  cursor: default;
+}
+
+.pokemon-description-card {
+  align-content: start;
+}
+
+.pokemon-description-card .detail-text {
+  max-width: 78ch;
+  font-size: 1rem;
+  line-height: 1.7;
+}
+
+.pokemon-core-grid,
+.pokemon-reference-grid {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 16px;
+  align-items: stretch;
+}
+
+.pokemon-core-card {
+  align-content: start;
+}
+
+.pokemon-core-note {
+  margin: 0;
+}
+
+.pokemon-core-value,
+.pokemon-favourite-list {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  min-width: 0;
+}
+
+.pokemon-favourite-chip {
+  align-items: flex-start;
+  flex-direction: column;
+  gap: 3px;
+}
+
+.pokemon-chip-note,
+.related-relation-label {
+  color: inherit;
+  font-size: 0.72rem;
+  font-weight: 950;
+  line-height: 1;
+  text-transform: uppercase;
+}
+
+.chip--danger,
+.related-pokemon-row__environment--opposite,
+.related-favourite-chip--opposite {
+  border-color: color-mix(in srgb, var(--danger) 62%, var(--line));
+  background: color-mix(in srgb, var(--danger) 16%, var(--surface));
+  color: #8f1717;
+}
+
 .pokemon-profile-grid {
   display: grid;
   grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
@@ -7976,8 +8075,11 @@ button:disabled,
   .entity-profile-grid,
   .home-hero,
   .pokemon-image-detail,
+  .pokemon-description-grid,
   .pokemon-profile-grid,
   .pokemon-profile-row,
+  .pokemon-core-grid,
+  .pokemon-reference-grid,
   .pokemon-related-grid,
   .profile-layout,
   .profile-layout--loading,
diff --git a/frontend/src/views/AdminView.vue b/frontend/src/views/AdminView.vue
index 1427d40..8f37a63 100644
--- a/frontend/src/views/AdminView.vue
+++ b/frontend/src/views/AdminView.vue
@@ -93,6 +93,8 @@ type AdminGroup = 'content' | 'configuration' | 'localization' | 'access';
 type AdminNavItem = { key: AdminTab; label: string; permission: string | string[] };
 type AdminNavGroup = { key: AdminGroup; label: string; items: AdminNavItem[] };
 type EditableConfig = (NamedEntity | Skill | GameVersion) & {
+  description?: string;
+  opposite?: NamedEntity | null;
   hasItemDrop?: boolean;
   hasTrading?: boolean;
   changeLog?: string;
@@ -205,12 +207,14 @@ const configTypes = computed<
     supportsItemDrop?: boolean;
     supportsTrading?: boolean;
     supportsChangeLog?: boolean;
+    supportsDescription?: boolean;
+    supportsOpposite?: boolean;
   }>
 >(() => [
   { key: 'pokemon-types', label: t('config.pokemonTypes') },
   { key: 'skills', label: t('config.skills'), supportsItemDrop: true, supportsTrading: true },
-  { key: 'environments', label: t('config.environments') },
-  { key: 'favorite-things', label: t('config.favoriteThings') },
+  { key: 'environments', label: t('config.environments'), supportsDescription: true, supportsOpposite: true },
+  { key: 'favorite-things', label: t('config.favoriteThings'), supportsOpposite: true },
   { key: 'acquisition-methods', label: t('config.acquisitionMethods') },
   { key: 'maps', label: t('config.maps') },
   { key: 'game-versions', label: t('config.gameVersions'), supportsChangeLog: true },
@@ -246,6 +250,8 @@ const message = ref('');
 const configForm = ref({
   id: 0,
   name: '',
+  description: '',
+  oppositeId: '',
   translations: {} as TranslationMap,
   hasItemDrop: false,
   hasTrading: false,
@@ -346,6 +352,12 @@ const configNameInput = computed({
   }
 });
 const configNamePlaceholder = computed(() => (isConfigDefaultLocale.value ? '' : configForm.value.name));
+const configOppositeOptions = computed(() => [
+  { id: '', name: t('common.none') },
+  ...configRows.value
+    .filter((item) => item.id !== configForm.value.id)
+    .map((item) => ({ id: item.id, name: item.name }))
+]);
 const activeConfigTab = computed({
   get: () => activeConfigType.value,
   set: (value: string) => {
@@ -610,7 +622,7 @@ async function loadLanguages() {
 }
 
 function resetConfigForm() {
-  configForm.value = { id: 0, name: '', translations: {}, hasItemDrop: false, hasTrading: false, changeLog: '' };
+  configForm.value = { id: 0, name: '', description: '', oppositeId: '', translations: {}, hasItemDrop: false, hasTrading: false, changeLog: '' };
 }
 
 function resetChecklistForm() {
@@ -718,6 +730,8 @@ function editConfig(item: EditableConfig) {
   configForm.value = {
     id: item.id,
     name: item.baseName ?? item.name,
+    description: item.description ?? '',
+    oppositeId: item.opposite ? String(item.opposite.id) : '',
     translations: item.translations ?? {},
     hasItemDrop: item.hasItemDrop === true,
     hasTrading: item.hasTrading === true,
@@ -1103,6 +1117,8 @@ async function saveConfig() {
     const payload = {
       name: configBaseNameForSave(),
       translations: configForm.value.translations,
+      description: selectedConfig.value.supportsDescription ? configForm.value.description : undefined,
+      oppositeId: selectedConfig.value.supportsOpposite && configForm.value.oppositeId ? Number(configForm.value.oppositeId) : null,
       hasItemDrop: selectedConfig.value.supportsItemDrop ? configForm.value.hasItemDrop : undefined,
       hasTrading: selectedConfig.value.supportsTrading ? configForm.value.hasTrading : undefined,
       changeLog: selectedConfig.value.supportsChangeLog ? configForm.value.changeLog : undefined
@@ -2158,9 +2174,11 @@ onMounted(() => {
         <template #default="{ item }">
           <span class="reorderable-row-title">
             {{ item.name }}
+            <span v-if="item.opposite" class="config-flag">{{ t('pages.admin.opposite') }}: {{ item.opposite.name }}</span>
             <span v-if="item.hasItemDrop" class="config-flag">{{ t('pages.admin.hasItemDrop') }}</span>
             <span v-if="item.hasTrading" class="config-flag">{{ t('pages.admin.hasTrading') }}</span>
           </span>
+          <span v-if="item.description" class="meta-line">{{ item.description }}</span>
           <span class="row-actions">
             <button v-if="can('admin.config.update')" type="button" :disabled="busy" @click="editConfig(item)">
               <Icon :icon="iconEdit" class="ui-icon" aria-hidden="true" />
@@ -2989,6 +3007,20 @@ onMounted(() => {
           <label for="config-name">{{ t('common.name') }}</label>
           <input id="config-name" v-model="configNameInput" :placeholder="configNamePlaceholder" :required="configNameRequired" />
         </div>
+        <div v-if="selectedConfig.supportsDescription" class="field">
+          <label for="config-description">{{ t('pages.admin.description') }}</label>
+          <textarea id="config-description" v-model="configForm.description"></textarea>
+        </div>
+        <div v-if="selectedConfig.supportsOpposite" class="field">
+          <label for="config-opposite">{{ t('pages.admin.opposite') }}</label>
+          <TagsSelect
+            id="config-opposite"
+            v-model="configForm.oppositeId"
+            :multiple="false"
+            :options="configOppositeOptions"
+            :placeholder="t('pages.admin.opposite')"
+          />
+        </div>
         <div v-if="selectedConfig.supportsItemDrop" class="check-row">
           <label>
             <input v-model="configForm.hasItemDrop" type="checkbox" />
diff --git a/frontend/src/views/PokemonDetail.vue b/frontend/src/views/PokemonDetail.vue
index d9a41c6..d40b51d 100644
--- a/frontend/src/views/PokemonDetail.vue
+++ b/frontend/src/views/PokemonDetail.vue
@@ -276,6 +276,7 @@ const listPath = computed(() => (pokemon.value?.isEventItem ? '/event-pokemon' :
 const detailKicker = computed(() => t(pokemon.value?.isEventItem ? 'pages.eventPokemon.detailKicker' : 'pages.pokemon.detailKicker'));
 const detailTabs = computed<TabOption[]>(() => [
   { value: 'details', label: t('common.details') },
+  { value: 'reference', label: t('pages.pokemon.referenceTab') },
   { value: 'discussion', label: t('discussion.title') },
   { value: 'history', label: t('history.editHistory') }
 ]);
@@ -322,6 +323,12 @@ const relatedPokemonRows = computed(() => {
     return rows.slice(0, relatedPokemonLimit);
   }
 
+  if (pokemon.value && selectedTab === habitatTabValue(pokemon.value.environment.id)) {
+    return rows
+      .filter((item) => habitatTabValue(item.environment.id) === selectedTab || item.environment.isOpposite)
+      .slice(0, relatedPokemonLimit);
+  }
+
   return rows.filter((item) => habitatTabValue(item.environment.id) === selectedTab).slice(0, relatedPokemonLimit);
 });
 const typeSlotClass = computed(() => ({
@@ -740,7 +747,7 @@ watch(initialPokemon, applyInitialPokemon, { immediate: true });
     </div>
   </section>
   <section v-else class="page-stack">
-    <PageHeader :title="`#${pokemon.displayId} ${pokemon.name}`" :subtitle="t('pages.pokemon.environmentPrefix', { name: pokemon.environment.name })">
+    <PageHeader :title="`#${pokemon.displayId} ${pokemon.name}`" :subtitle="pokemon.genus || t('pages.pokemon.detailSubtitle')">
       <template #kicker>{{ detailKicker }}</template>
       <template #actions>
         <RouterLink v-if="canUpdatePokemon" class="ui-button ui-button--primary ui-button--small" :to="`/pokemon/${pokemon.id}/edit`">
@@ -758,66 +765,49 @@ watch(initialPokemon, applyInitialPokemon, { immediate: true });
       <Tabs id="pokemon-detail-tabs" v-model="detailTab" :tabs="detailTabs" :label="t('common.details')" />
 
       <div v-if="detailTab === 'details'" class="detail-grid detail-grid--stack">
-        <div class="pokemon-profile-grid pokemon-profile-grid--with-image">
-          <div class="pokemon-profile-main">
-            <section class="detail-section pokemon-profile-card" :aria-label="t('pages.pokemon.details')">
-              <p v-if="pokemon.genus" class="pokemon-genus">{{ pokemon.genus }}</p>
-              <div v-if="pokemon.genus && pokemon.details.trim()" class="pokemon-profile-divider"></div>
-              <p v-if="pokemon.details.trim()" class="detail-text">{{ pokemon.details }}</p>
-              <p v-if="!pokemon.genus && !pokemon.details.trim()" class="meta-line">{{ t('common.none') }}</p>
-            </section>
-
-            <div class="pokemon-profile-row">
-              <section class="detail-section pokemon-profile-card" :aria-label="t('pages.pokemon.measurements')">
-                <div class="pokemon-measurement-display">
-                  <div class="pokemon-measurement-item" :title="`${formatImperialHeight(pokemon.heightInches)} / ${formatMetricMeasure(pokemon.heightMeters)} m`">
-                    <div class="pokemon-measurement-stack">
-                      <strong class="pokemon-measurement-value">{{ formatImperialHeight(pokemon.heightInches) }}</strong>
-                      <span class="pokemon-measurement-divider" aria-hidden="true"></span>
-                      <strong class="pokemon-measurement-value">{{ formatMetricMeasure(pokemon.heightMeters) }} m</strong>
-                      <span class="pokemon-measurement-label">{{ t('pages.pokemon.height') }}</span>
-                    </div>
-                  </div>
-                  <div class="pokemon-measurement-item" :title="`${formatPoundsMeasure(pokemon.weightPounds)} lbs / ${formatMetricMeasure(pokemon.weightKg)} kg`">
-                    <div class="pokemon-measurement-stack">
-                      <strong class="pokemon-measurement-value">{{ formatPoundsMeasure(pokemon.weightPounds) }} lbs</strong>
-                      <span class="pokemon-measurement-divider" aria-hidden="true"></span>
-                      <strong class="pokemon-measurement-value">{{ formatMetricMeasure(pokemon.weightKg) }} kg</strong>
-                      <span class="pokemon-measurement-label">{{ t('pages.pokemon.weight') }}</span>
-                    </div>
-                  </div>
-                </div>
-              </section>
-
-              <section class="detail-section pokemon-profile-card pokemon-types-card" :aria-label="t('pages.pokemon.types')">
-                <div v-if="pokemon.types.length" class="pokemon-type-slots" :class="typeSlotClass">
-                  <span v-for="type in pokemon.types.slice(0, 2)" :key="type.id" class="chip pokemon-type-chip">
-                    <img v-if="pokemonTypeIconSrc(type.id)" class="pokemon-type-chip__icon" :src="pokemonTypeIconSrc(type.id) ?? undefined" alt="" aria-hidden="true" />
-                    <span>{{ type.name }}</span>
-                  </span>
-                </div>
-                <p v-else class="meta-line">{{ t('common.none') }}</p>
-              </section>
-            </div>
+        <div class="pokemon-description-grid">
+          <button v-if="pokemon.image" type="button" class="pokemon-description-image" :aria-label="pokemonImageLabel()" @click="openImageModal">
+            <img :src="pokemon.image.url" :alt="pokemonImageAlt()" />
+          </button>
+          <div v-else class="pokemon-description-image pokemon-description-image--placeholder" role="img" :aria-label="t('pages.pokemon.imageEmpty')">
+            <PokeBallMark size="82px" />
           </div>
 
-          <div class="pokemon-profile-side pokemon-profile-side--with-image">
-            <DetailSection class="pokemon-profile-stats" :title="t('pages.pokemon.statsTitle')">
-              <PokemonStatsPanel :stats="pokemon.stats" />
-            </DetailSection>
-
-            <button v-if="pokemon.image" type="button" class="pokemon-profile-image" :aria-label="pokemonImageLabel()" @click="openImageModal">
-              <img :src="pokemon.image.url" :alt="pokemonImageAlt()" />
-            </button>
-            <div v-else class="pokemon-profile-image pokemon-profile-image--placeholder" role="img" :aria-label="t('pages.pokemon.imageEmpty')">
-              <PokeBallMark size="64px" />
-            </div>
-          </div>
+          <section class="detail-section pokemon-description-card" :aria-label="t('pages.pokemon.details')">
+            <h2 class="section-subtitle">{{ t('pages.pokemon.description') }}</h2>
+            <p v-if="pokemon.details.trim()" class="detail-text">{{ pokemon.details }}</p>
+            <p v-else class="meta-line">{{ t('common.none') }}</p>
+          </section>
         </div>
 
-        <DetailSection :title="t('pages.pokemon.skills')">
-          <EntityChips :items="pokemon.skills" />
-        </DetailSection>
+        <div class="pokemon-core-grid" :aria-label="t('pages.pokemon.coreFactors')">
+          <DetailSection class="pokemon-core-card" :title="t('pages.pokemon.skills')">
+            <p class="meta-line pokemon-core-note">{{ t('pages.pokemon.skillsCoreNote') }}</p>
+            <EntityChips :items="pokemon.skills" />
+          </DetailSection>
+
+          <DetailSection class="pokemon-core-card" :title="t('pages.pokemon.environment')">
+            <p class="meta-line pokemon-core-note">{{ t('pages.pokemon.environmentCoreNote') }}</p>
+            <div class="pokemon-core-value">
+              <span class="chip">{{ pokemon.environment.name }}</span>
+              <span v-if="pokemon.environment.opposite" class="chip chip--danger">
+                {{ t('pages.pokemon.opposite') }}: {{ pokemon.environment.opposite.name }}
+              </span>
+            </div>
+            <p v-if="pokemon.environment.description" class="detail-text">{{ pokemon.environment.description }}</p>
+          </DetailSection>
+
+          <DetailSection class="pokemon-core-card" :title="t('pages.pokemon.favoriteThings')">
+            <p class="meta-line pokemon-core-note">{{ t('pages.pokemon.favoriteThingsCoreNote') }}</p>
+            <div v-if="pokemon.favorite_things.length" class="pokemon-favourite-list">
+              <span v-for="thing in pokemon.favorite_things" :key="thing.id" class="chip pokemon-favourite-chip">
+                <span>{{ thing.name }}</span>
+                <span v-if="thing.opposite" class="pokemon-chip-note">{{ t('pages.pokemon.opposite') }}: {{ thing.opposite.name }}</span>
+              </span>
+            </div>
+            <p v-else class="meta-line">{{ t('common.none') }}</p>
+          </DetailSection>
+        </div>
 
         <DetailSection v-if="hasItemDropSkill" :title="t('pages.pokemon.skillDrops')">
           <ul class="row-list skill-drop-summary">
@@ -864,10 +854,6 @@ watch(initialPokemon, applyInitialPokemon, { immediate: true });
           </div>
         </DetailSection>
 
-        <DetailSection :title="t('pages.pokemon.favoriteThings')">
-          <EntityChips :items="pokemon.favorite_things" />
-        </DetailSection>
-
         <div class="pokemon-related-grid">
           <DetailSection :title="t('pages.pokemon.relatedPokemon')">
             <template v-if="pokemon.relatedPokemon.length">
@@ -896,9 +882,13 @@ watch(initialPokemon, applyInitialPokemon, { immediate: true });
                           />
                           <span
                             class="chip related-pokemon-row__environment"
-                            :class="{ 'related-pokemon-row__environment--match': related.environment.id === pokemon.environment.id }"
+                            :class="{
+                              'related-pokemon-row__environment--match': related.environment.matches || related.environment.id === pokemon.environment.id,
+                              'related-pokemon-row__environment--opposite': related.environment.isOpposite
+                            }"
                           >
-                            {{ related.environment.name }}
+                            <span>{{ related.environment.name }}</span>
+                            <span v-if="related.environment.isOpposite" class="related-relation-label">{{ t('pages.pokemon.opposite') }}</span>
                           </span>
                         </div>
                       </div>
@@ -910,9 +900,10 @@ watch(initialPokemon, applyInitialPokemon, { immediate: true });
                           v-for="thing in related.favorite_things"
                           :key="thing.id"
                           class="chip related-favourite-chip"
-                          :class="{ 'related-favourite-chip--match': thing.matches }"
+                          :class="{ 'related-favourite-chip--match': thing.matches, 'related-favourite-chip--opposite': thing.isOpposite }"
                         >
-                          {{ thing.name }}
+                          <span>{{ thing.name }}</span>
+                          <span v-if="thing.isOpposite" class="related-relation-label">{{ t('pages.pokemon.opposite') }}</span>
                         </span>
                       </div>
                     </div>
@@ -982,6 +973,51 @@ watch(initialPokemon, applyInitialPokemon, { immediate: true });
         </DetailSection>
       </div>
 
+      <div v-else-if="detailTab === 'reference'" class="detail-grid detail-grid--stack">
+        <DetailSection :title="t('pages.pokemon.referenceData')">
+          <p class="meta-line">{{ t('pages.pokemon.pokedexReferenceNote') }}</p>
+        </DetailSection>
+
+        <div class="pokemon-reference-grid">
+          <section class="detail-section pokemon-profile-card" :aria-label="t('pages.pokemon.measurements')">
+            <h2 class="section-subtitle">{{ t('pages.pokemon.measurements') }}</h2>
+            <div class="pokemon-measurement-display">
+              <div class="pokemon-measurement-item" :title="`${formatImperialHeight(pokemon.heightInches)} / ${formatMetricMeasure(pokemon.heightMeters)} m`">
+                <div class="pokemon-measurement-stack">
+                  <strong class="pokemon-measurement-value">{{ formatImperialHeight(pokemon.heightInches) }}</strong>
+                  <span class="pokemon-measurement-divider" aria-hidden="true"></span>
+                  <strong class="pokemon-measurement-value">{{ formatMetricMeasure(pokemon.heightMeters) }} m</strong>
+                  <span class="pokemon-measurement-label">{{ t('pages.pokemon.height') }}</span>
+                </div>
+              </div>
+              <div class="pokemon-measurement-item" :title="`${formatPoundsMeasure(pokemon.weightPounds)} lbs / ${formatMetricMeasure(pokemon.weightKg)} kg`">
+                <div class="pokemon-measurement-stack">
+                  <strong class="pokemon-measurement-value">{{ formatPoundsMeasure(pokemon.weightPounds) }} lbs</strong>
+                  <span class="pokemon-measurement-divider" aria-hidden="true"></span>
+                  <strong class="pokemon-measurement-value">{{ formatMetricMeasure(pokemon.weightKg) }} kg</strong>
+                  <span class="pokemon-measurement-label">{{ t('pages.pokemon.weight') }}</span>
+                </div>
+              </div>
+            </div>
+          </section>
+
+          <section class="detail-section pokemon-profile-card pokemon-types-card" :aria-label="t('pages.pokemon.types')">
+            <h2 class="section-subtitle">{{ t('pages.pokemon.types') }}</h2>
+            <div v-if="pokemon.types.length" class="pokemon-type-slots" :class="typeSlotClass">
+              <span v-for="type in pokemon.types.slice(0, 2)" :key="type.id" class="chip pokemon-type-chip">
+                <img v-if="pokemonTypeIconSrc(type.id)" class="pokemon-type-chip__icon" :src="pokemonTypeIconSrc(type.id) ?? undefined" alt="" aria-hidden="true" />
+                <span>{{ type.name }}</span>
+              </span>
+            </div>
+            <p v-else class="meta-line">{{ t('common.none') }}</p>
+          </section>
+
+          <DetailSection class="pokemon-profile-stats" :title="t('pages.pokemon.statsTitle')">
+            <PokemonStatsPanel :stats="pokemon.stats" />
+          </DetailSection>
+        </div>
+      </div>
+
       <div v-else-if="detailTab === 'discussion'" class="detail-tab-panel">
         <EntityDiscussionPanel entity-type="pokemon" :entity-id="pokemon.id" />
       </div>
diff --git a/system-wordings.ts b/system-wordings.ts
index 9bb7f3c..42c6fc9 100644
--- a/system-wordings.ts
+++ b/system-wordings.ts
@@ -552,6 +552,7 @@ export const systemWordingMessages = {
         subtitle: 'Search Pokemon and filter by specialities, ideal habitat, and favourites.',
         listKicker: 'Pokédex',
         detailKicker: 'Pokédex Detail',
+        detailSubtitle: 'Pokemon profile',
         editKicker: 'Pokédex Edit',
         editSubtitle: 'Maintain Pokemon profile, details, types, stats, specialities, and favourites.',
         editSections: 'Pokemon edit sections',
@@ -588,6 +589,15 @@ export const systemWordingMessages = {
         loadingEdit: 'Loading Pokemon editor',
         environmentPrefix: 'Ideal Habitat: {name}',
         details: 'Details',
+        description: 'Pokemon Description',
+        referenceTab: 'Pokédex reference',
+        referenceData: 'Pokédex reference data',
+        pokedexReferenceNote: 'Stats, height, weight, and types follow the Pokédex-style reference design only. They are not Pokopia mechanics.',
+        coreFactors: 'Core factors',
+        skillsCoreNote: 'Affects habitat selection, item drops, and Trading behavior.',
+        environmentCoreNote: 'Affects habitat selection and related Pokemon comparison.',
+        favoriteThingsCoreNote: 'Affects item drops, hidden item tags, and Trading price evidence.',
+        opposite: 'Opposite',
         genus: 'Genus',
         height: 'Height',
         heightInput: 'Height (in)',
@@ -1129,6 +1139,7 @@ export const systemWordingMessages = {
         editConfig: 'Edit {name}',
         hasItemDrop: 'Has item drop',
         hasTrading: 'Has trading',
+        opposite: 'Opposite',
         changeLog: 'ChangeLog',
         dragSort: 'Drag to reorder: {name}',
         dragSortTitle: 'Drag to reorder',
@@ -1966,6 +1977,7 @@ export const systemWordingMessages = {
         subtitle: '搜索宝可梦，并按特长、环境、喜欢的东西筛选。',
         listKicker: 'Pokédex',
         detailKicker: 'Pokédex Detail',
+        detailSubtitle: 'Pokemon 资料',
         editKicker: 'Pokédex Edit',
         editSubtitle: '维护 Pokemon 介绍、属性、六维、特长和喜欢的东西。',
         editSections: 'Pokemon 编辑分区',
@@ -2002,6 +2014,15 @@ export const systemWordingMessages = {
         loadingEdit: '正在加载 Pokemon 编辑内容',
         environmentPrefix: '喜欢的环境：{name}',
         details: '介绍',
+        description: 'Pokemon Description',
+        referenceTab: 'Pokédex 参考',
+        referenceData: 'Pokédex 参考数据',
+        pokedexReferenceNote: '六维、身高体重和属性仅参考 Pokédex 的展示设计，不属于 Pokopia 机制。',
+        coreFactors: '核心要素',
+        skillsCoreNote: '影响栖息地选择、物品掉落和 Trading 行为。',
+        environmentCoreNote: '影响栖息地选择和相关 Pokemon 对比。',
+        favoriteThingsCoreNote: '影响物品掉落、隐藏标签判断和 Trading 价格证据。',
+        opposite: '反义',
         genus: '分类',
         height: '身高',
         heightInput: '身高（in）',
@@ -2543,6 +2564,7 @@ export const systemWordingMessages = {
         editConfig: '编辑{name}',
         hasItemDrop: '有掉落物',
         hasTrading: '有 Trading',
+        opposite: '反义词',
         changeLog: 'ChangeLog',
         dragSort: '拖曳排序：{name}',
         dragSortTitle: '拖曳排序',