Pikachu is the mascot of the whole Pokémon franchise. As such, it has been made available in every single main series game in existence, except for those based in Unova. In ORAS, a variant of Pikachu is also available, called the Cosplay Pikachu; it gets access to moves Pikachu would not normally learn, but it cannot evolve.

Completed analyses of the Pichu line so far: