Monster Rancher : Let the Games Begin (Vol. 1)

Genki wins a Monster Rancher tournament, receives a 'Monster 200X' CD-ROM as a prize, slips it into his player, and is magically sucked into the Monster Rancher world. Bragging to Holly that he's a game expert, Genki facilitates her escape from the Black Dino Squad. Holly reveals Moo's plot to conquer her world and describes her quest to defeat Moo by finding the mystery disk that contains the Phoenix. Genki inserts his own CD-ROM into the shrine and it unlocks not the Phoenix, but a cute, perpetually hungry little monster he names Mocchi.