Easy level up for Sora, Donald & Goofy.
Go to the Pridelands and be sure you go to the save point at Pride Rock that is in Rafiki's place go the Lion's Den to the Peak where you fought Scar's Ghost and now it is full of nothing but Heartless as far as the eye can see. This is a great way to level up and you can keep going back to it to it whenever you want to level up, remember though the higher up in levels you are the longer it takes to level up but you can do this several times but to resummon the Heartless you must leave the Lion's Den to Pride Rock go back into the Lion's Den and back to the Peak and they will be back to battle you again. There are a lot of them so you get your experience points worth doing this.
If you need more help, we've got more Kingdom Hearts II cheats and also check out all of the answers for this game
Comments for this hint