Pikachu - The mouse pokémon. This pokémon has electricity-storing pouches on its cheeks. These appear to become electrically charged during the night while Pikachu sleeps. It occasionally discharges electricity when it is dozy after waking up. Pikachu can help other Pikachu who are feeling weak by sharing its electric current. Pikachu's tail is sometimes struck by lightning as it raises it to check its surroundings. When several of these Pokémon gather, their electricity could build up and cause lightning storms. Forest dwellers, they are few in number and exceptionally rare. The pouches in their cheeks discharge electricity at their opponents. Pikachu are believed to be highly intelligent.