Monster Rancher 2

This game involves raising, fighting, and breeding monsters. The main character is never seen on screen and never talks to anyone directly. Instead, all of the dialog and action is done by the trainer's assistant Colt and her toucan Joy. The player chooses his actions and choices through menu options.

Source: Wikipedia, "Monster Racher 2," available under the CC-BY-SA License.

Monster Rancher 2 allows you to unleash hundreds of monsters from CD's you already own - music CD's, PC software CD's, or even other game CD's. After you have unleashed monsters you can combine them to create other monsters, and once you've found monsters you like you train them to do battle in a monster fighting league.