From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Usage and power
Vegeta curls his fingers and places both his hands together at chest level facing the same direction (so that the palm of one hand is on the back of the other). He then thrusts both hands forward to fire a powerful blast of energy once enough Ki is gathered. The result is a powerful, fuchsia-colored energy beam wave that emanates from his hands and body. During the Saiyan Saga, Vegeta's power level was 18,000 and tried to destroy the entire planet Earth using his Galick Gun. This shows how immensily powerful this attack can be: on Namek, Vegeta uses a version of the Galick Gun against Frieza who kicks it in outer space where it creates an explosion much greater than the planet itself. As Vegeta's power level increases, the power of the Galick Gun also increases.
Dragon Ball Z
Vegeta first used this attack in his first fight against Son Goku during the Saiyan Saga: Vegeta becomes furious seeing Goku surpassed him so he decides to destroy the entire planet and charges his most powerful attack, the Galick Gun. When Goku countered the Gyallic Ho with a Kaio-ken x3 Kamehameha, Vegeta noted that the two energy waves were evenly matched. Eventually, Goku's Kaio-ken x3 Kamehameha outmatched it easily when Goku executed a Kaio-ken x4.
Later, Semi-Perfect Cell used this attack against Ascended Super Saiyan Vegeta to no effect: Cell's Galick Gun nearly desroys an entire island but he did not even faze Vegeta. This is because Cell's power in his semi perfect form was much lower than Ascended SSJ Vegeta.
During Vegetto's fight against Super Boo (Goten, Trunks, Piccolo, and Gohan absorbed), Super Boo used one of Gotenks' attacks that consisted of a Kamehameha and a Gyallic Ho.
Dragon Ball GT
Vegeta has the attack in his "what if" Super Saiyan 3 form as an Ultimate Attack in Dragon Ball: Raging Blast. Here, Vegeta uses his newly acquired Super Saiyan 3 powers to magnify the power of the Galick Gun to incredible heights, which are probably even greater than that of a standard Big Bang Attack or Final Flash (which, in this game, are simple Super Attacks in his Super Saiyan 3 form).
Vegeta said that the Gyallic Ho was capable of destroying large planets if enough power was put into it, although this potential was never realized. It is one of Vegeta's signature attacks.
The Galick Gun has many variations:
- Finger Galick Gun - Vegeta used technique very similar to Galick Gun to destroy the planet Arlia and its moon, only it was fired from the finger and spiraled like the Special Beam Cannon.
- Final Galick Cannon - Vegeta delivers several rapid attacks before punching the enemy's stomach and discharging a one-handed Galick Gun through the enemy. He used the technique to kill Zarbon. This technique is used in the Budokai Tenkaichi series.
- Double Galick Gun - Vegeta charges up a Galick Gun in each hand and fires them both together with twice the power. Vegeta uses this in an attempt to destroy Frieza in his second form. Frieza, however, was unharmed and unfazed by the attack.
- Final Burst Cannon - A supercharged version of Galick Gun used by Vegeta in his last attempt to destroy Frieza. However, Frieza managed to kick the attack up into space, creating a huge explosion many times bigger than Planet Namek.
- Double Galick Cannon - Vegeta places both of his hands on the opponent's chest and fires a huge yellow energy blast against them. Vegeta used this to kill one of Babidi's henchmen, Pui Pui. This technique is one of his Super Attacks in Dragon Ball: Raging Blast.
- Super Galick Gun - A full powered version of the Galick Gun, created and used by the Great Ape Baby. It is capable of destroying an entire planet if charged, and inflicting massive damage even uncharged. Vegeta also used it earlier against Baby Gohan's Super Kamehameha.
- Crimson Galick Gun: A game-only version of the Galick Gun created by Vegeta upon achieving Super Saiyan 3. In this state, the Galick Gun's power is greatly enhanced and gives off a crimson aura, similar to the 10x Kamehameha.
The attack name can be translated as Garlic Gun or Galick Gun. In keeping with the Saiyan pun on vegetables, it is named after the vegetable garlic. Gārikku is the Japanese word garlic.
- In Dragon Ball Z: Supersonic Warriors 2, the Galick Gun is performed by Vegeta throwing his hand backwards and then forwards, thus shooting the beam.
- In the 4Kids dub of Dragon Ball Z Kai, this attack is renamed Galick Blast similar to the Spirit Bomb being renamed Spirit Blast, likely because it is on broadcast TV.