Porunga Erases the Public Memory of Majin Buu
SPOILER!
Six months later · The world is allowed to move on
Six months after
Kid Buu is defeated, the Namekian Dragon Balls are used again. This time the wish is not resurrection or battlefield logistics: ordinary people on Earth have their memories of Majin Buu erased.
Mr. Satan and the people closest to Buu still know who he is, but the wider public no longer remembers the monster responsible for the catastrophe.
Why it matters
The final wish of DBZ is social repair. Instead of rebuilding a planet or reviving a fighter, the Dragon Balls make it possible for the good Buu to live on Earth without the entire population seeing the face of the creature that killed them.