1x13 - Monster Rancher

Genki and Mocchi manage to climb out of the canyon, and Genki leaves Mocchi (who is caught by a Clay) to free his friends and all of the slaves. The meet Pixie for a showdown, but the ruins collapse while they're fighting, and Big Blue digs them out. Pixie realizes that she is doing what she despises the most by imprisoning the humans, so she decides be join the Searchers' cause.