Trunks starts the attack by extending his arms to both sides of himself and forms two golden or blue energy spheres. Then, he brings his arms in front of him and holds out his hands with his index fingers pointed outward like a child pretending to use a gun, and fires a large golden energy wave at the opponent, inflicting a high amount of damage.
Trunks (who is with Goten in a Mighty Mask disguise) first uses the Big Tree Cannon in an attempt to blast Android 18 out of the sky during the final match of the 25th World Martial Arts Tournament, but to his dismay, she dodges it. He also uses the attack along with Goten's Kamehameha to attack the solidified Bio-Broly in the movie Dragon Ball Z: Bio-Broly, though in this usage, its color is changed to blue.
Appearances in games
The attack appears under the name Kiai Ho in the Butōden series, and V Cannon in Dragon Ball Z: Supersonic Warriors 2. It is named Big Tree Cannon in the Budokai Tenkaichi series, where it an Ultimate Blast used by Super Saiyan Kid Trunks and Gotenks in his base form, and one of Gotenks Blast 2 attacks in his Super Saiyan and Super Saiyan 3 forms. In the Raging Blast games, Gotenks' usage in his base form has the attack's color changed to blue. In Dragon Ball Z: Battle of Z, Kid Trunks' version is called Victory Cannon while Gotenks' version is called Ultra Finger Missile.
- Magnum Finger – A single powerful Finger Beam version used by Gotenks in his base form, in the video game Battle of Z.
- Revenge Cannon – A powerful Mouth Energy Wave version used by Gotenks as a Super Saiyan 3, as a furious response to Super Buu's Gack! mouth wave.
- The technique's Japanese name, Bikutorī Kyanon (ビクトリーキャノン), can be translated as either "Big Tree Cannon" or "Victory Cannon". The Bikutorī Kyanon translated as "Victory Cannon" is used for Gotenks' Mouth Energy Wave technique in the Budokai series.
- The name of the technique also is a pun on its user's name, Trunks and "Big Tree Cannon".