Final Burst Cannon
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Directory: Techniques → Offensive techniques → Ki → Energy waves
The Final Burst Cannon (ファイナル バースト キャノン, Fainaru Bāsuto Kyanon) is an advanced version of the Galick Gun and used by Vegeta. To utilize it, Vegeta draws his hands out to his sides as he powers up, creating an enormous whitish-purple aura around his body. Then, he throws his arms out in front of him and fires a gigantic Galick Gun at the opponent, inflicting a massive amount of damage.
Vegeta used this attack in his battle against Freeza in his Final Form on Planet Namek. In an angry attempt to prove that he really was a Super Saiyan, Vegeta flew up into the air and fired the Final Burst Cannon down at Frieza. Although at first surprised, Freeza flew straight towards the Final Burst Cannon and kicked it back up into the air before it destroyed Planet Namek much to everyone's shock. The blast narrowly missed Vegeta and flew deep into outer space, where it created a blinding explosion many times bigger than Planet Namek itself.
Final Burst Cannon is named in the Raging Blast video game series and is Vegeta (Scouter)'s Ultimate Blast.