From the Super Mario Wiki
Reversya Cursyas are Cursyas in the game Super Paper Mario. They can be distinguished from other Cursyas because of their yellow coloration. If touched, they have the ability to curse the main characters so the controls become backwards similar to Grim Leechers from the Yoshi's Island series (they are "reversed," as the Cursya's name indicates).
This is the only enemy to give the Dizzy status effect in this game.
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