Giant Pokémon are Pokémon which are significantly and abnormally larger than the normal size specifications. There have been several occurences of giant Pokémon in the anime.
Examples of Giant Pokémon[]
In the episode Mystery at the Lighthouse, a giant Dragonite appears towards the end of the episode, where Bill is searching for it.
In the episode IL019: Tentacool & Tentacruel, a Tentacool evolves into an abnormally large Tentacruel after exposure to Team Rocket's
Also in the episode Island of the Giant Pokémon some giant Pokémon can be seen such as Pikachu, a Blastoise, etc., although at the end of episode it is revealed that they were mechanical replicas of a theme park.
A giant Gengar and Alakazam, as well as a giant Jigglypuff were also seen after Ash Ketchum discovered the ruins of an ancient city in IL072: The Ancient Puzzle of Pokemopolis.