Master-Student Kamehameha
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Directory: Techniques → Offensive techniques → Ki → Energy waves
The Master-Student Kamehameha (師弟 かめはめ波, Shitei Kamehameha; Literally meaning "Teacher and Student Turtle Destruction Wave") is an energy wave attack used by Kuririn, Son Goku, and Turtle Hermit.
Usage
Goku, Kuririn, and Turtle Hermit each charge their own Kamehameha. They then fire them at the same time so that they merge into a one large Kamehameha, inflicting a huge amount of damage.
History
Films
Goku, Kuririn, and Turtle Hermit used this attack in their battle against Doctor Uiro in Dragon Ball Z: The World's Strongest. It did not have any effect, however, because his metal armor withstood the blast.