Dragon Ball Super (2015), S01E007: How Dare You Hit My Bulma! Vegeta’s Furious Transformation?!
Beerus effortlessly disposes of Majin Boo, while Vegeta stands by in awe. Vegeta tries to persuade Beerus to calm down and enjoy himself, but he refuses to listen. Trunks and Goten fuse into Gotenks and attack to no avail. Powerless to do anything else, Gotenks starts insulting Beerus for which he is promptly punished. Piccolo, Tenshinhan, and Android 18 try taking on Beerus with little success. Majin Boo attacks again but is unable to land a single hit. While observing the battle, Dende realizes what Beerus actually is and immediately informs Piccolo. Before Piccolo is able to warn him, Gohan powers up and charges towards Beerus. Using Majin Boo as a weapon, Beerus repels Gohan, taking them both out. Being the last one standing, Vegeta confronts Beerus, but he is swiftly brought to the ground. Beerus tells Vegeta that he is disappointed with him; that he is just as weak as his father was. Just as Beerus is about to finish Vegeta, Bulma walks up and slaps him for ruining her party. Beerus retaliates in similar fashion. Seeing Bulma struck infuriates Vegeta; he explodes and powers up immensely.