From the Super Mario Wiki
A Cursya is an enemy from the game Super Paper Mario. They resemble 7 tall green blobs with eyes, and two flexing protrusions on both sides that appear to be hands or claws. Switching to 3-D however, Cursyas are revealed to be made of thin, spinning disks. Touching one will result in the active character being cursed, and their name is even a portmanteau of curse and you. The different types of Cursya each place a different curse on the heroes, though Piccolo can instantly remove any of these status-changing curses. Cursyas also come in Dark varieties in every kind except the Back Cursya. Since all Cursyas look the same except for color, the Dark varieties make it impossible to tell which Cursya is which.
The regular Cursya will make the player move slower. They are first found in 2-4, moving slowly across a wide floor in Merlee's Basement. Its card can by obtained by falling off the front of the mansion's roof in 2-2. It is in a treasure chest located on the balcony. Since they cannot be harmed directly, the player must attack from a distance using Bowser's Fire Breath, Boomer, Cudge, Barry, or an item.
Cursyas sometimes will drop a Poison Shroom when defeated.
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