Fat Buu, which is the fat form of Majin Buu, can refer to
- Innocent Buu, the original half of Fat Buu with both good and evil as a result of Kid Buu absorbing the Grand Supreme Kai.
- Good Buu, the pure good half of Fat Buu as a result of Innocent Buu releasing his evil half, Evil Buu, through fission which in turn made him pure good.
- Future Innocent Buu, the alternate timeline counterpart of Innocent Buu from Future Trunks' timeline.
- Future Good Buu, Good Buu’s future counterpart.
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