Le temps des adieux

Buu clears some space in the countryside and builds a house for him to live in. Goten and Trunks continue learning the Fusion Dance, and begin to master the technique. They each plead with Goku for him to show them the Super Saiyan 3 transformation, and because he knows his time is up, Goku complies. Soon after the transformation, Baba shows up to take him away. Goku says goodbye to everyone, including Chi-Chi and Goten at the lookout and tells them that he will find Gohan in Other World, but Videl insists that Gohan is still alive somewhere. Once again, he is gone, leaving Piccolo in charge of training Goten and Trunks. (Source: Wikipedia)