Gary Oak

Gary Oak is Professor Oak's grandson and Ash Ketchum's rival in the first few seasons. His starter Pokémon was a Squirtle that later became a Blastoise.

Background
Gary Oak (オーキド・シゲル), voiced by Yuko Kobayashi in Japanese and Billy Beach in English, is Ash's rival. He first appeared in Pokemon - I Choose You!, where he left Pallet Town and wanted to become a Pokémon Master before Ash did. In the beginning, Gary claims to be the best of the best and has the typical smug attitude, known by having fangirls and a fanclub to go along, but, as the Anime moves forward, he becomes less prideful and arrogant than that of his earlier appearances in the anime.

Pokémon Strategies
Gary and Ash's techniques are like the North and South pole's of the world; while Gary spends his time raising his pokémon in good technique and teaches them tough and cool moves, Ash uses clever strategy during battle and teaches most of his Pokémon tough and smart moves; Gary's Pokémon endure tough training and do not rely on luck and love in order to win battles.

In the Games
The only game Gary is in is Pokemon Puzzle League, however his counterpart in the main series of games is Blue, who is Gym Leader of Viridian City in Gold, Silver, Crystal, HeartGold, and SoulSilver.

In the Manga
He has a counterpart in the manga named Blue (Green in Japan).

With Professor Oak
He also has at least thirteen other Pokémon as seen in "Primeape Goes Bananas".

Kanto League

 * Boulder Badge
 * Cascade Badge
 * Rainbow Badge
 * 5 Unidentified Badges

Johto League

 * 8 Unknown Badges

Pokemon League Status

 * Kanto Conference (Indigo League) Loses to Melissa: Top 32
 * Silver Conference (Johto League) Loses to Ash: Top 16

Contests

 * Extreme Pokémon: Runner-Up

Trivia

 * In Gary's first appearance in Battle Frontier, Gary's new clothes resemble trainer Blue's clothes in Pokémon FireRed and LeafGreen.
 * Gary is the counterpart of Green in the Japanese Edition of the manga, Pokémon Special. Though, due to the fact that Pokémon Green was not released in America, his name was changed to Blue in the manga and games for the English release.
 * Like Dawn and Brock, Gary Oak will not appear in the Best Wishes! series, as he now lives in Sinnoh.
 * Gary's Electivire is his only Pokémon which is from a region other than Kanto or Johto.