Jill's Icy Secret Monster Farm: Enbanseki no himitsu : Season 2 Episode 20

The group travels north, and comes across a village of Jill. Jill tells them of the legend of Cinderbird, who changed the evil Skullcapt into a regular Jill. Jill decides that Genki and his friends have true souls of goodness, and decide to show them the Phoenix, which is encased in a giant ice cube. But Moo comes, fully reenergized. Genki and the others attempt to lead Moo away from the Phoenix.