really easy leveling up for master form i guarantee all 8 levels in under like 30 min. In Mulans world the area just before the summit(where you fight the unknown, assumably riku)theres those craters with the drive orbs in them, 2 of them side by side with 2 sets of dragon missle things. well clear out that area of heartless, then run to the summit, and go back to make sure no other heartless appear. now figure out a way to make both thos containers blow up at the same time. for me i would be faceing straight on the dragon missle to the left. remember if you hit the dragon things once they blow up. neways make it so when you hit the one dragon missle it blows up both crates and drive into master form, collect the orbs and immediatly run back to the summit while the screen loads hold down and you'll be braught back to the area just before the summit and the crates will have regenerated but no heartless will spawn because you haven't went far enough away, then just continue the first few steps, if you do it fast enough your drive bar wont go down and you'll level up really really fast, i got to level 5 in like 4 or 5 minutes!