He has a mouth instead of a left eye, one on his stomach, and left shoulder. His right arm was replaced by a cannon that launches cannon-balls.
Osso Bucco was once the former Major league number 1. He has been defeated by Maniac, and lost his rank in the Major league. This defeat leads him to become depressed. He then killed an Dream princess, an act considered as sacrilege in Dreamland. He was condemned to be removed from his free will and he was prisoned in an Egg. Later he managed to escape from his Egg.
During the survival of the Celestia fest, he fought against The Kill Stars and was defeated by Lion Messi, although the outcome was very close. He took Lion all his power and his most powerful attack to defeat the former Major League's number one.
He then fought against Sacha Creshric who defeated and killed him easily.
He is now a common dreamer again.
His power allow him to eat the powers of other then to vomit them. He also has a cannon instead of a right arm. After a fight against the Kill Star, he was killed by Sacha.
Metal Arm/Arm Cannon