Crazee Dayzees are enemies in the Mario series. They first appeared in Super Mario World 2: Yoshi's Island. They act the same like Shy Guys, but when a Yoshi eats it and swallows it, the Crazee Dayzee survives. It also survives when Yoshi spits it out. Except if Yoshi spits the Crazee Dayzee at another enemy.
Crazee Dayzees does not appear in any Mario game except the Paper Mario games.