The last boss' name is " Inferno Lord Fire Leo ". At the beginning of the battle, he runs around launching Magma Rocks. Hit the rocks at Mach Speed until you're on on fire. If you are on fire, Leo is able to hit. So hit him until his fire is gone on the top of his head. Now punch him in Slow until he spins aruond like the duck-suited robots. Dodge his attacks ( Slow will help ) until he's dizzy. Then hit him ( any VFX mode will do ) like HECK until he jumps into the mittle of the areana. He'll come back with fire on his head. Reapeat this process until he is done for.