Dragon Ball Z Special 2008 - Yo! The Return of Son Goku and Friends!!

Two years after the defeat of Majin Buu in the main Dragon Ball Z series, Mr. Satan finally finishes construction on his brand new hotel. Feeling guilty that the hotel is in honor of what the majority of Earth believes to be his defeat of Majin Buu, he invites all of the Z Fighters and their families to a banquet. Shortly after dinner begins two Saiyan Spaceships land just outside of town, and a mysterious Saiyan confronts the party at the hotel. He is revealed to be Vegeta's brother, Tarble, who had been deemed too weak to fight in the past and thus had been sent to a distant star before the destruction of Planet Vegeta. He asks his brother for help in dealing with Abo and Cado, soldiers who are remnants of Frieza's army, who are causing havoc on his world. As Abo and Cado land, the Z Fighters draw straws to see who gets to battle. Goten and Trunks are chosen to fight and the battle begins. Without going Super Saiyan, the children are easily defeating the two soldiers so Ado and Cado fuse into Aka.