Acutally Buu's transformation time line should be like this:
1. Kid buu - the original buu, most evil
2. Muscular buu - west surpreme kai asbored
3. Fat buu - The north surpreme fat kai asbored
4. Thin buu - The evil buu lies under fat bun
5. Not-that-thin buu - Fat buu is asbored
6...