Flounder in The Little Mermaid
Flounder is a fish who is Ariel's best friend. He starred in the Disney movie The Little Mermaid, and makes his first appearance in Epic Mickey: Power of Illusion, where, like many others, he has been sucked out of Toon World and into Wasteland by Mizrabel.
He is trapped in the Castle of Illusion, and requires Mickey's assistance in escaping.