The Kaio-ken Kamehameha is a combination of the Kaio-ken technique and the Kamehameha Wave, used by Goku. Goku transforms into his Kaio-ken form and uses the Kamehameha, inflicting multiple damage depending on what Kaio-ken level he is using for the attack. The only known Kaio-ken levels he used for the attack are Kaio-ken x3, Kaio-ken x4, and Kaio-ken x20.