How do you beat that parasite cage, monstro? KH CoM!?

Question

Please help! Been trying to beat it forever and keep losing!

Answer 1

He's a little tricky. If you're having a lot of trouble, go back through monstro and level up and use your moogle points to get good cards and rework your deck. Enter the battle and attack and avoid the poison water as best you can. If you get weak, head back on the rotating islands and heal then attack again.

Answer 2

you hit it, and if you get to weak heal yourself