It's Cake Time, Bro

In order to go to a party at Neptune's underwater pad, Dez accidental becomes a merman. But he's so into getting to the party, because Tsuni is going, that he puts off dealing with the problem until later. It turns out there's more to being a merman than breathing water and figuring out how to use the special bathroom, because Dez finds out he's now one of Neptune's subjects. He keeps up a brave face in front of Tsuni, as Neptune orders him around, but it's finally all too much for him.

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S01E16 - I Wear This Hat Ironically