Twin-Headded Yami Dragoshi: One huge fusion. First you have Yami Yoshi, who acts 15 years younger than his ~30 year old age, and knows all the old yoshi tricks. Then there's Pharoah Yami Yoshi, the revived guy from ancient Egypt who reluctantly joined forces with the OGers, and knows quite a few tricks from the old days, when he tapped into some sort of mystical powers that haven't exactly been explained. Finally, there's Black Skull Dragoshi, who was a fusion of three things that I can't quite be sure I know. BSD's a large, muscular yoshi with wings and can throw a mean Molten Egg.
Cerberus: A demonic three-headed dog that guards the gate to S-Space, or the Dark Dimension. It was eventually injected with the blood of Fusion, turning him into the super-powerful Fusion Cerberus, but for Yami's sake, we'll assume it's plain ol' non-Fusion-blooded Cerberus.
remember the time i had a big obnoxious signature