Mark Chang is the Prince of Yugopotamia and a close friend of Timmy 's. He also has a crush on Vicky Timmy's babysitter who became her love interest in some episodes. Mark is a species of Yugopotamia an alien from outerspace where a place is that everyone behaves and likes things opposite of humans and also he can transform himself into human form.
First appearance: Spaced Out
He appeared in the game: The Fairly OddParents: Shadow Showdown
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