Treeby is a playable character in Frogger 2: Swampy's Revenge. He is a tree frog.
Frogger 2: Swampy's Revenge BioEdit
"Out of his tree and ready to play, Treeby is a nervous, crazy- looking, frog. Happier amongst the branches, he's almost as acrobatic as Frogger and hates water just as much." 
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