Im trying to think of a way to use Regigas's attack that does 120, but 40 if they have damage counters and I need to know if there is a card that can heal the opponets defending pokemon so this move can be used at full power.
you could use unkown k, but then, it may be a waste, with a good gigas deck, your gigas should only attack once, MAYBE twice, so doing 120>40 really isnt gonna make a big difference.
But if you run it with Dialga G Lv. X it'll shut off the body so you don't have to wait for your opponent to get to 3 Prizes. Then Level up your Gigas to Gigas X, and you can just switch off from 120 to 100 and so on and so forth. Since Crush Grip only does 40 if the opponents Pokemon has damage on it, and Gigas can't use Giga Blaster each turn. Just switch off between the attacks. Use Crush Grip for 120, finish them off with Giga Blaster. And repeat.
Well, you could use damage swap from Platinum's Banette, but that might knock him out. Of course, this will allow you to bring up Regigigas Lv.X for free.