As you would expect, Mighty Bull is from Equestia. His real name is Mightersons Buller. He's actselly the cousin of Iron Will, and a ex-friend of Russel the Minotaur. Unlike Russel who has some good, Might was pretty much a straight forword complete bully, but even worse then Russel in some standerds. Might was even feared by the teachers, even Professor Eagle Beak avoided him at all costs! He basicly enflusend a troubled Russel to be a bully to begin with, and actselly orinstracted Russel to rat on Sky Slicer that got Russel into a bad scrape, and he did nothing to aid him in it. When Russel recovered, he had a bad fight with Might and the two went their seperate ways. Russel got the ultamate payback with help from Taiku by informing Celestia that the reason russel did everything so awful, aside from an awful past, was because Might was a terrorable influence and Sky Slicer's rage was his fault. As a result, he was exspelled, and exiled to Mythos. He lived alone for awhile till he befriends more exsiled equestian mythic beasts and eventally a harpy native to mythos, orcanstragited an escape from Mythos via pouchers, but ended up on Desteny islands instead. Convinetly to end up as a pirate with Captain Blot, with not much complaints from Might, donning the nickname, Mighty Bull.