Finish Flash (フィニッシュフラッシュ) is a double Energy wave used by Gotenks to finish his opponent after the Splitting Headache. Gotenks emits a large amount of ki from his two hands, burning up his opponent.
Gotenks uses the Finish Flash against Super Buu when he fights him outside of the Hyperbolic Time Chamber. After cutting the Majin in half with the Splitting Headache, Gotenks fires the Finish Flash to blow the two halves into little pieces. However, the pieces which surround Gotenks wrap up and join together to reform Super Buu, allowing him to squeeze Gotenks and send him crashing into the nearby canyon rocks.