Sebastian is a red Jamaican crab who is often given the task of looking after Ariel in Disney's The Little Mermaid. He makes his first appearance in Epic Mickey: Power of Illusion, where he has been sucked into Wasteland by Mizrabel, who has trapped him in her Castle of Illusion.

Ariel will eventually ask Mickey to help find him in the quest, Soft Shell. He can be found in Under the Sea. After he has been rescued, he will return to Ariel's Room, where he will keep an eye on her for the rest of his stay.

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