Gary Oak (Japanese: オーキド・シゲル Shigeru Ōkido) is a character featured in the Pokémon anime series and the Electric Tale of Pikachu manga. Based on the character of Blue from the games, he is the grandson of Professor Oak and was Ash Ketchum's biggest rival in their journeys through Kanto and Johto. His Japanese name is derived from that of Shigeru Miyamoto.
By the events of the episode "Showdown at the Po-Ké Corral", Gary had over 200 Pokémon in his collection, including more than one of the same species.
- Krabby (giant)
- Doduo → Dodrio
In his journey through Kanto, Gary was able to collect ten badges to compete in the Indigo Plateau Conference, and showed off the whole set in "The Battle of the Badge". Of the ten badges, only three of them - the Boulder Badge, the Cascade Badge, and the Rainbow Badge - are the same as any of the eight badges obtained in the game; the names of the other seven badges are unknown.