While the fundamentals of the technique are exactly the same as a regular Kamehameha, the overall power of this Kamehameha is even greater due to Master Roshi being in his MAX Power form.
Master Roshi first uses this attack to extinguish the roaring flames on Fire Mountain. The MAX Power Kamehameha succeeds in extinguishing the fire, but the blast is so powerful that it blows away the mountain and the Ox-King's castle. Master Roshi later uses it as Jackie Chun during his match against Goku at the 21st World Martial Arts Tournament. When Goku turns into a Great Ape by taking a glimpse at the full moon, Jackie Chun fires MAX Power Kamehameha to destroy the moon, reverting Goku back to his normal self.
It is officially named Kamehameha Saidai Shutsuryoku (かめはめ波最大出力; lit. "Turtle Destructive Wave at Maximum Output") in Japanese, referring to its debut in the manga and anime series.
Master Roshi later attempts to use the MAX Power Kamehameha against Broly in Broly - The Legendary Super Saiyan, although he ended up backing down at the last minute due to him being drunk.
In Dragon Ball Z: Resurrection ‘F’, Roshi uses the technique to defeat a group of Frieza's Soldiers.
In the Universe Survival Saga, Roshi enters in his Max Power state during the Tournament of Power. He uses his MAX Power Kamehameha several times, making Jium from Team Universe 10 fall off the arena.
Appearances in games
Roshi uses the attack as an opponent in Dragon Ball: Dragon Daihikyou. Named Max Kamehameha, the technique is one of Roshi's super attacks in the Butōden series. The technique was named MAX POWER Kamehameha in Budokai Tenkaichi series, where it appears as Master Roshi's Ultimate Blast in his Max Power form (spelled "MAX POWER Kamehameha" in Budokai Tenkaichi 3). It is used by Jackie Chun during the first boss battle of Dragon Ball Z: Attack of the Saiyans. In Dragon Ball Z: Shin Budokai it appears under the name Full Power Kamehameha where it is used by Krillin against Frieza.
In Dragon Ball: Advanced Adventure, Goku eventually learns the technique as well. In Dragon Ball Online, the technique is called Giant Kamehameha and is a skill learned by Turtle Hermits at level 48. Its area of effect is listed as "15 meter radius around a single target".
In Dragon Ball Fusions, it appears under the name Full Power Kamehameha and can be learned as a Special Move by Kid Goku after he reaches Lv. 65 and by Goten after he reaches Lv. 70. In Dragon Ball Fusions, it acts like a stronger version of Super Kamehameha.
- The MAX Power Kamehameha is the first technique shown to be powerful enough to destroy a planetary body (the Moon) in the Dragon Ball series.