Beating Winter's Secret in TMNT

My son is playing TMNT on the Wii, he has gotten to the last level but can't seem to find a way to damage the final boss, does anyone have a hint or a direction that can help him get this figured out ?? THanks.Beating Winter's Secret in TMNT
This is the cheat for Xbox 360 but it should be the same concept.



The last boss you cannot do your regular special moves on. This is a bit more tricky, but once you learn it, it's easy, and he dies quickly. First start with the one turtle, and when it tells you to switch to the next turtle.. do it! Then when the boss starts shooting his stuff at you, press and hold the x button. Don't let go of the x button right away! Whoever you'll be holding will reflect the weapons that he's throwing at you, back to him. When he's on the platform hovering overhead and shooting flames at you, just avoid them. Don't bother to attack, cuz you'll most likely just kill yourself, lol. When he's in position again, do the same thing. Press X when it tells you, press and hold X, and do the same as before. I think it takes 3 times of doing this, then the final boss is dead!