Gym Leader

A Gym Leader (Japanese: ジムリーダー Gym Leader) is the highest ranking member of a Pokémon Gym. If a trainer defeats a Gym Leader in battle, then the trainer earns that Gym's Badge.

Although similar in nature, Frontier Brains are not considered Gym Leaders and are thus not included in this list.

Indigo League

Gym Leader (Japanese)		City (Japanese)	Type		Badge
File:SpriteBrock.png Brock (タケシ Takeshi)		Pewter City (ニビシティ Nibi City)	Rock		File:Boulderbadge.png Boulderbadge
File:SpriteMisty.png Misty (カスミ Kasumi)		Cerulean City (ハナダシティ Hanada City)	Water		File:Cascadebadge.png Cascadebadge
File:SpriteSurge.png Lt. Surge (マチス Machisu)		Vermilion City (クチバシティ Kuchiba City)	Electric		File:Thunderbadge.png Thunderbadge
File:SpriteErika.png Erika (エリカ Erika)		Celadon City (タマムシシティ Tamamushi City)	Grass		File:Rainbowbadge.png Rainbowbadge
File:SpriteKoga.png Koga** (キョウ Kyo)	File:SpriteJanine.gif Janine* (アンズ Anzu)	Fuchsia City (セキチクシティ Sekishiku City)	Poison		File:Soulbadge.png Soulbadge
File:SpriteSabrina.png Sabrina (ナツメ Natsume)		Saffron City (ヤマブキシティ Yamabuki City)	Psychic		File:Marshbadge.png Marshbadge
File:SpriteBlaine.png Blaine (カツラ Katsura)		Cinnabar Island (グレンじま Guren Island)	Fire		File:Volcanobadge.png Volcanobadge
File:SpriteGiovanni.png Giovanni** (サカキ Sakaki)	File:SpriteBlue.png Blue* (グリーン Green)	Viridian City (トキワシティ Tokiwa City)	Ground	Various	File:Earthbadge.png Earthbadge

Orange League

Gym Leader	Island	Challenge	Badge
File:Cissybattle.jpg Cissy (アツミ Atsumi)	Mikan Island (ナツカン島 Natsukan Island)	Water Gun target test Surfing race	File:Coraleyebadge.png Coral Eye Badge
File:Danny.jpg Danny (ダン Dan)	Navel Island (ナツカン島 Natsukan Island)	Toboggan race	File:Searubybadge.png Sea Ruby Badge
File:Rudy-pose.jpg Rudy (ジギー Jigī)	Trovita Island (ユズ島 Yuzu Island)	Target test same-type Pokémon battle	File:Spikeshellbadge.png Spike Shell Badge
File:Luana.jpg Luana (ルリコ Ruriko)	Kumquat Island (リュウチン島 Ryūchin Island)	Double battle	File:Jadestarbadge.png Jade Star Badge

Johto League

Gym Leader (Japanese)	City (Japanese)	Type	Badge
File:SpriteFalkner.gif Falkner (ハヤト Hayato)	Violet City (キキョウシティ Kikyō City)	Flying	File:Zephyrbadge.png Zephyrbadge
File:SpriteBugsy.gif Bugsy (ツクシ Tsukushi)	Azalea Town (ヒワダタウン Hiwada Town)	Bug	File:Hivebadge.png Hivebadge
File:SpriteWhitney.gif Whitney (アカネ Akane)	Goldenrod City (コガネシティ Cogane City)	Normal	File:Plainbadge.png Plainbadge
File:SpriteMorty.gif Morty (マツバ Matsuba)	Ecruteak City (エンジュシティ Enju City)	Ghost	File:Fogbadge.png Fogbadge
File:SpriteChuck.gif Chuck (シジマ Shijima)	Cianwood City (タンバシティ Tanba City)	Fighting	File:Stormbadge.png Stormbadge
File:SpriteJasmine.gif Jasmine (ミカン Mikan)	Olivine City (アサギシティ Asagi City)	Steel	File:Mineralbadge.png Mineralbadge
File:SpritePryce.gif Pryce (ヤナギ Yanagi)	Mahogany Town (チョウジタウン Chōji Town)	Ice	File:Glacierbadge.png Glacierbadge
File:SpriteClair.gif Clair (イブキ Ibuki)	Blackthorn City (フスベシティ Fusube City)	Dragon	File:Risingbadge.png Risingbadge

Hoenn League

Gym Leader		City	Type	Badge
File:SpriteRoxanne.png Roxanne (ツツジ Tsutsuji)		Rustboro City (カナズミシティ Kanazumi City)	Rock	File:Stonebadge.png Stonebadge
File:SpriteBrawly.png Brawly (トウキ Tōki)		Dewford Town (ムロタウン Muro Town)	Fighting	File:Knucklebadge.png Knucklebadge
File:SpriteWattson.png Wattson (テッセン Tessen)		Mauville City (キンセツシティ Kinsetsu City)	Electric	File:Dynamobadge.png Dynamobadge
File:SpriteFlannery.png Flannery (アスナ Asuna)		Lavaridge Town (フエンタウン Fuen Town)	Fire	File:Heatbadge.png Heatbadge
File:SpriteNorman.png Norman (センリ Senri)		Petalburg City (トウカシティ Touka City)	Normal	File:Balancebadge.png Balancebadge
File:SpriteWinona.png Winona (ナギ Nagi)		Fortree City (ヒワマキシティ Hiwamaki City)	Flying	File:Featherbadge.png Featherbadge
File:SpriteTateandLiza.png Tate & Liza (フウとラン Fū & Ran)		Mossdeep City (トクサネシティ Tokusane City)	Psychic	File:Mindbadge.png Mindbadge
File:SpriteWallace.png Wallace* (ミクリ Mikuri)	File:SpriteJuan.png Juan* (アダン Adan)	Sootopolis City (Rune City)	Water	File:Rainbadge.png Rainbadge

Sinnoh League

Gym Leader	City	Type	Badge
File:SpriteHyouta.png Roark (ヒョウタ Hyouta)	Oreburgh City (クロガネシティ Kurogane City)	Rock	Coalbadge Coalbadge
File:SpriteNatane.png Gardenia (ナタネ Natane)	Eterna City (ハクタイシティ Hakutai City)	Grass	Forestbadge Forestbadge
File:SpriteSumomo.png Maylene (スモモ Sumomo)	Veilstone City (トバリシティ Tobari City)	Fighting	Cobalbadge Cobblebadge
File:SpriteMakishi.png Wake (マキシ Maxi)	Pastoria City (ノモセシティ Nomose City)	Water	Fenbadge Fenbadge
File:SpriteMerissa.png Fantina (メリッサ Melissa)	Hearthome City (ヨスガシティ Yosuga City)	Ghost	Relicbadge Relicbadge
File:SpriteTougan.png Byron (トウガン Tougan)	Canalave City (ミオシティ Mio City)	Steel	Minebadge Minebadge
File:SpriteSuzuna.png Candice (スズナ Suzuna)	Snowpoint City (キッサキシティ Kissaki City)	Ice	Iciclebadge Iciclebadge
File:SpriteDenji.png Volkner (デンジ Denzi)	Sunyshore City (ナギサシティ Nagisa City)	Electric	Beaconbadge Beaconbadge

Trivia

• Every Gym Leader that specializes in Template:Type2 Pokémon uses Geodude in battle.
• Each in-game region but Johto begins with a Gym Leader that specializes in Template:Type2 Pokémon.
• Johto is the only region that did not repeat types from gyms released in previous generations.
• Even though there are 32 known gyms in the games, there has not yet been a gym specializing in Template:Type2 Pokémon. Only Poison-, Ground-, Bug-, and Template:Type2 gyms are not located in multiple regions. Each of the twelve other types has been repeated at least once, and Rock-, Water-, Electric-, and Template:Type2 gyms appear in three of the four regions.
• If you count the Dojo in Kanto (before it became a Dojo) there has been a Template:Type2 gym in each region at some point in time.
• For DP009, Professor Oak's lecture is about Gym Leaders. He writes this Pokémon senryū about them: ジムリーダー　いのちをかけて　かかってこい