"It was the awesome power of our new device that caused the destruction! It is this power that will help us get our revenge, and what happened there is but a small sample of what we're capable of! We could wipe the life from this entire planet, and turn it into a barren desert in the blink of an eye! ...But after all, what good would this incredible power be if there were no souls left to fear it, hm?"
Planet Geyser (プラネットゲイザー) is an energy blast attack used by Dr. Wheelo, as well as Broly in his Legendary Super Saiyan form. When the energy blast hits the ground, it explodes and creates a giant geyser-like blast of energy that blasts the opponent up in the air, inflicting massive damage and capable of causing massive collateral damage to the surrounding area.
Dr. Wheelo fires an energy wave, while Broly uses an energy sphere to create the giant geyser-like blast that emerges from the ground. Wheelo curls his mechanical body together as he charges energy around his robotic body, he then brings his arms and legs apart, and fires a massive reddish-orange energy wave from his entire body at the opponent. Wheelo's version of Planet Geyser is a result of a weapon developed by Kochin and Wheelo, which has apparently been incorporated into Wheelo's robotic body. Broly blasts the opponent down into the ground with an Eraser Cannon, the sphere then explodes and creates a giant geyser-like, green blast of energy that blasts the opponent up in the air. Unlike Dr. Wheelo, Broly's version of the technique is completely natural as it is simply a variation of his Eraser Cannon.
Dr. Kochin mentions that Dr. Wheelo used the technique to turn a vast forest area near South City into a wasteland, calling this some of Dr. Wheelo's "brilliant scientific techniques". Towards the end of the movie, Dr. Wheelo uses the attack in an attempt to destroy Goku and his friends along with the entire Earth. However, at the last second, Goku gathers enough energy for the Spirit Bomb and fires it up at the Planet Geyser, overpowering Dr. Wheelo's attack and destroying the robotic mad scientist once and for all.
Shortly after transforming into a Legendary Super Saiyan, Broly uses the attack during his rampage in order to destroy the strip mines on New Planet Vegeta, killing many Shamoian slaves who were working there. He then uses the attack to completely destroy what remains of the planet Shamo in front of the Shamoian slaves. Seven years later, in Dragon Ball Z: Broly - Second Coming, he uses the technique against Goten and Trunks twice. In the first instance, he briefly charges up his energy shield (causing Trunks and Goten to speculate that he was surrendering) before charging up the attack, implying that the attack could potentially harm Broly in his regular Super Saiyan state.
Appearances in games
The technique was named Planet Geyser in Dragon Ball Z: Budokai Tenkaichi 3 and Dragon Ball Z: Supersonic Warriors 2. It appears as Dr. Wheelo's Ultimate Blast in Budokai Tenkaichi 3 and as one of Legendary Super Saiyan Broly's super attacks Supersonic Warriors 2.