Wisdom: Go to the alleyway right at the star of The World that never was and head out and go flameboy on every heartless you see, then run back to the alley and head through that weird portal thingy that takes you to wear Axel dies when your limit gauge gets low, then come back to have your limit gauge full again.

Master: Go to Mulan's world and warp to that little city that's been burnt to shreds then head up to the next area that leads to the mountains. Smash all the crates and stuff in this area and then head back to the save point, leave the world and come back when your limit gauge is low.

Final: Warp to the bottom of Yensid's tower in Twilight Town. Head outside in your form, take out all the nobodies and then come back in and start heading up the tower and taking those out. Make sure to get back to the save point in time before your limit gauge runs out.