Dragon Ball Kai (2014) - episode 18 - 09 Aug, 2014

Goku and Vegeta's fight continues to escalate, with Vegeta revealing he chose to go under Babidi's control in order to gain the strength to face off against Goku, feeling he needed to get rid of his gentle side. Meanwhile, as the seal containing Majin Buu starts to break, Gohan attempts to stop Buu from reaching full power by shooting multiple Kamehameha Waves at the egg, in an attempt to destroy it. The egg splits apart with seemingly nothing more than pink smoke coming out of it, leading Supreme Kai to presume Majin Buu had been destroyed. However, Gohan senses a powerful energy from the smoke, which coalesces together to form Majin Buu, who appears to be nothing more than a mere fat child. (Source: Wikipedia)