Tingles
Tingles are beings of all sorts that Uncle Rupee has turned into slaves. He lures them to his pool and gives them a lust for Rupees, along with a green suit to match. He promises them that if they collect enough Rupees for him, they will be able to enter Rupeeland. After they obtain a high enough amount of Rupees, they do indeed go to Rupeeland. When they reach Rupeeland, they find out that it is a desolate place, and that they'll have to serve Uncle Rupee for all eternity.
Tingle was a Tingle until he found out the truth about Uncle Rupee from the Great Fairy, and defeated the Rupee Master once and for all. It is unknown as to why he kept the name "Tingle" along with his green outfit.