A computer worm (not in a PC, but the Tomodachi is still just a tiny portable computing device for a virtual pet game) disguised as a chubby Pikachu. Manipulative and eager to get out by hijacking your body and leaving you in it's place... but is rather clingy to those who "rescue" (release) them. Pretends to be a Pikachu, and can speak englidh, but still pretends not to.