Hyper Flash

Hyper Flash, also known as Sonic Boom , is a signature attack used by Hyper Sonic exclusively in Sonic 3 & Knuckles. Sonic creates a mesmerizingly bright flash, and destroys all of his enemies by the time the flash has cleared. To perform the attack, Hyper Sonic must attempt the Insta-shield, and will then perform Hyper Flash instead. Hyper Flash can be seen as Sonic's equivalent to Hyper Knuckles' Gliding Shock Wave Attack.