Shin Budokai - Another Road
Like the main timeline, Future Innocent Buu expels all of the evil in his body, becoming pure good as well as creating a new Buu. The new, thin Buu turns the tables and turns the fat Buu into chocolate. He eats him, and changes into a new and far more powerful form, Future Super Buu.
After Future Mr. Satan prevents Future Babidi from having his wish granted, the enraged Future Babidi lashes out at Future Mr. Satan, but Future Super Buu takes the blow instead, leaving him near death. Future Babidi desperately tries to revive Future Super Buu but once revived, Future Super Buu eats Future Babidi for his treachery. Upon gaining Future Babidi's power, Future Super Buu changes form and achieves his pure form, Future Kid Buu. However, he suddenly begins feeling intense pain, and purposely spits out Good Buu. When Future Kid Buu begins making countless copies of Super Buu, which begin spreading chaos, Future Good Buu joins the Z Fighters and helps them save Earth from the armies of Majin Buus and Fighting Puppets.
Future Good Buu is significantly weaker than Future Innocent Buu, as he was outclassed by Future Evil Buu.