Pokémon Pikachu is a series of Pokémon mini units, that are very Tamagotchi-like portable units. Featuring the lovable electric rat, Pikachu, the games allowed their holders to interact with the Pikachu.

There have been at least two releases of Pokémon Pikachu. The first is simply called Pokémon Pikachu, but the second is called Pokémon Pikachu 2 GS and can interact with Pokémon Gold, Silver, and Crystal via the Gameboy Color’s Infrared Communication Port and Pokémon Gold, Silver, and Crystal’s Mystery Gift option.