→In Generation I: Editing a bit about releasing Pikachu. Mentioning that attempting to release does not change Pikachu's friendship. (I tested this repeatedly.)
*Notably, reflecting the [[EP014|actions]] of Ash's Pikachu, this Pikachu will refuse a [[Thunder Stone|Thunderstone]] given to it in Yellow, and, if talked to after the player tries to use the stone, will shake its head in refusal. It will not evolve unless traded to another cartridge. (The player can obtain Raichu in Yellow either by trading one in or by using a Thunderstone on a Pikachu traded from another game.)
After the player stores Pikachu in Bill's computer, Pikachu complains and becomes less friendly toward the player.
The player is also unable to release Pikachu; if release is attempted, Pikachu will complain.
In battle, Pikachu's animations and cry are different from other Pikachu, its voice based on [[Ikue Ohtani]]'s. In the [[Virtual Console]] release of Pokémon Yellow, Pikachu can also participate in the [[Pikachu's Beach|Surf Minigame]].