Ultimate Gohan

Ultimate Gohan (dubbed by fans as "Mystic Gohan") is a state Gohan achieves during the Majin Buu Saga in Dragon Ball Z when his hidden potential is unlocked by Elder Kai. His power increases dramatically, to the point of being stronger than his father Goku as a Super Saiyan 3. He is the strongest non-fused character at the end of the manga and anime and the third-strongest in the whole manga and anime (third only to Super Buu with Gotenks absorbed and Vegito).

He was named Ultimate Gohan in the Budokai Tenkaichi Series, Although in the Budokai Series this state is called Elder Kai Unlock Ability