Delay Majin Buu, The Limit! Super Saiyan 3!!

Plot:

Realizing that Majin Buu is headed for Capsule Corp., Trunks breaks off from his Fusion training, and heads home to retrieve the Dragon Radar. To buy him the time he needs, Goku engages Majin Buu, and showcases a new level of power. Far away from the fighting, Mr. Satan pledges to save the people of Earth from Majin Buu.