In Duelist Kingdom Bones works for Bandit Keith. But when Keith abuses and then ditches Bones and the rest of his gang, stealing their star chips Bones becomes the leader of the misfit trio. Bones is a graveyard duelist. He first duels Joey (cheating because he's with Keith) and, after losing, reappears at Battle City picking on kids in the graveyard. Until Yami Bakura picks on him... well, all three of them and then they don't do much of anything.
The other two are Syd and Zygor, but they're brainless lackeys (great accents in the dub though)
*the first one is Bones, then Syd, then Zygor