Ill Flash

The Ill Flash begins with Buu opening his mouth wide and generating a sphere of intense pink energy, streaked with arcs of black and pink electricity. The crackling sphere builds in intensity before Buu releases it as a focused, narrow beam of pink energy. Despite its relatively slim profile compared to other mouth blasts, the Ill Flash carries tremendous destructive power and fires quickly enough to catch opponents off guard.

The technique's various alternate names in different localizations and dubs (Gack!, Gah!, Guoah!) reflect the primal scream Buu lets out while firing, emphasizing that this isn't a carefully controlled technique but rather a violent expulsion of raw energy.

The attack's earliest chronological use comes from Huge Buu (the initial fat form of Kid Buu from millions of years ago), who fires it at Shin, the Supreme Kai. Grand Supreme Kai intercepts the blast before it connects.

Super Buu uses the Ill Flash to devastating effect against Super Saiyan 3 Gotenks. After knocking Gotenks into a building, Buu catches the fused warrior off guard with a mouth blast as Gotenks attempts to counter-attack. The beam injures Gotenks and leaves Buu laughing at the humiliation. An angry Gotenks responds with his own Revenge Cannon, evening the score.

Super Buu later uses the technique against Ultimate Gohan, though the full-powered Gohan handles it more effectively. The Ill Flash also appears throughout Buu's battles in the Kai's planet dimension, where Kid Buu fires it repeatedly in his frenzied assault.

In the Xenoverse series, the Ill Flash is available as a learnable skill, named Evil Buster in some localizations. Both the Future Warrior and Janemba can equip it in Xenoverse 2. The Budokai Tenkaichi series features it as part of Super Buu and Kid Buu's movesets. The technique's fast charge time and narrow beam make it particularly useful in games as a quick-firing option when larger energy waves would be too slow.