Big Bang Crash
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Semi-Perfect Cell extends his hand forward and forms a red Big Bang Attack. He then shouts, "Take this!" and fires the attack at his opponent, inflicting a high amount of damage and even creating a large red dome of energy upon contact.
Dragon Ball Z
Semi-Perfect Cell first used this attack to destroy an island in order to flush Artificial Human No. 18 out of hiding. When she did not appear, Semi-Perfect Cell destroyed several islands with many Big Bang Crashes. He was about to use the attack again to destroy the island that Artificial Human No. 16 and No. 18 were hiding on, however, just before he could blow it up, Vegeta and Future Trunks Brief (after receiving a year's worth of training in the Hyperbolic Time Chamber) appeared and fought against Semi-Perfect Cell.
- Mouth Big Bang Crash - Semi-Perfect Cell used a mouth version of this move against Vegeta in his Ascended Super Saiyan form.
- Super Big Bang Crash - An upgraded version of the Big Bang Crash in which Semi-Perfect Cell fires a barrage of Big Bang Crashes. He used this technique to destroy some islands while searching for No. 18.