Charlie

Charles "Charlie" Fish is a blue tuna in SpongeBob. In Walking Small he sat on SpongeBob. In Grandma's Kisses he made fun of SpongeBob. And then he was in the "Mr. Magic's Magical Magic Kit" Commercial and he was described as boring, dull, drab and platitudinous. Mr. Magic then transform him into a magician. He also made an appearance in SpongeBob's House Party.

He becomes one of Nat's friends in Nat Peterson Adventures! from Season 2 onward. He is still fond of Magic at the least, but his personality has been modified. He is a little bit crazy, likes rock and roll, and is a fan of Many, MANY other things.