The Power-up Continues?! He's Complete! Super Gotenks!
In the Sacred Realm of the Kais, Elder Kai continues his unusual ritual with Gohan, promising a massive breakthrough if the young warrior can endure the lengthy process. Back on Earth, Goten and Trunks push their Fusion training to the next level, aiming to combine their strength while transformed. Meanwhile, as Majin Buu wanders the countryside, a chance encounter with a helpless creature leads to an unexpected shift in the monster's behavior.
Aired 07/12/2014EP 35 - The Power-up Continues?! He's Complete! Super Gotenks!
Dragon Ball Z Kai: The Final Chapters
Since Cell's defeat Gohan has grown up and go to the university then she meets Videl which who has some adventures, then both and his new brother Goten are training for the new tournament, in which Goku came back from the dead for one day. In half of the tournament a misterious persons advice the group about the resurrection of the dangerous Majin Boo, but all plans fails and every one try new ways to stop The dangerous Majin Boo who gets stronger each time. Goku and his friends make everything for stopping them through fights.
(Source: Anime News Network, edited)
Note: Remastered version of the Majin Boo arc that adheres more to the manga's story.