Yo Bro

Yo Brothers, also called Yo Bros. are an enemy encountered in Woohoo Hooniversity during the events of Mario & Luigi: Superstar Saga. The enemy was vaguely Koopa-like and sported a magician's hat and cape. The Yo Bro also held two yo-yos, one red and one green. Whichever yo-yo it spun indicated which Mario brother it would attack.