Dragon Ball: Ossu! Kaettekita Son Gokuu to Nakama-tachi!!

Based on an original concept by the original author Akira Toriyama, the story, set shortly after the defeat of Majin Buu, pits Son Gokuu and his friends against a new, powerful enemy. This special introduces four new characters: Abo and Kado red and blue aliens wearing battle fatigues similar to Frieza's army, one tiny yellow alien, and a young Saiyan child who vaguely resembles Vegeta named Tarble. Though very little about the plot has been revealed, Tarble has arrived on Earth, being pursued by Abo and Kado. (Source: Wikipedia)Two years have passed since the battle with Majin Boo. Mr.Satan's hotel, built as a commemoration of the victory over Boo, is finally complete!!Gokuu and the other fighters are invited as guests. While Goku and the others are enjoying the party, a strange pod falls to Earth. Inside, a sharp-eyed Saiyan detects strong fighting abilities and takes a small alien along to the party! When the Saiyan encounters Vegeta, his words shock everyone!!