The Jestabocky (オバケピエロ Obake Piero?) is a Dream Eater that appears in Kingdom Hearts 3D: Dream Drop Distance. Its Spirit version is obtained via Spirit synthesis, while its Nightmare version can be found in Traverse Town, Country of the Musketeers, and Prankster's Paradise.
Kingdom Hearts 3D: Dream Drop Distance
When this spoofy spook isn't pretending to be prizes, it's trying to nab the real ones...and there's your opportunity to strike.