Pikachu is the evolved form of Pichu. It evoles from Pichu when it reaches high friendship with the player and Pikachu evolves into a Riachu when it is exposed to a Thunderstone. Pikachu is one of Nintendo's collective mascots.
Pikachu appears as a short, chubby rodent-like Pokemon. Pikachu has two roundish, red cheeks used to store or release electricity. Its tail is in a zigzag fashion and near the bottom of the tail, there is a brownish spot. Pikachu has pointy ears, and it has black on each tip. Its feet are very small compared to its whole body.