Ep. 251: Goten and Trunks fuse into Gotenks to fight Majin Buu despite Piccolo's warnings
Aired on December 21, 1994

Goten and Trunks attempt to fuse, resulting in a weak, fat child and then an emaciated old man before successfully creating Gotenks. Piccolo advises waiting thirty minutes for the fusion to expire to attempt it as Super Saiyans, but Gotenks ignores this and leaves to confront Majin Buu. He lands some initial blows on the monster, but when Buu increases his intensity, Gotenks is easily defeated. Meanwhile, on the world of the Kais, Old Kai continues the lengthy ceremony required to awaken Gohan's hidden power.
Episodes
- Ep. 247 · Goku teaches Goten and Trunks the Fusion Dance while exhausted from Super Saiyan 3
- Ep. 248 · Goku bids farewell after teaching Super Saiyan 3 before Baba arrives to take him away.
- Ep. 249 · Goku Returns to Other World to Find Gohan and Assist in Training
- Ep. 250 · Old Kai Emerges From the Broken Z Sword to Awaken Gohan
- Ep. 251 · Goten and Trunks fuse into Gotenks to fight Majin Buu despite Piccolo's warnings
- Ep. 252 · Goten and Trunks recover while Gohan meditates and Hercule attempts to befriend Buu
- Ep. 253 · Gotenks fails to defeat Buu while Buu vows to stop killing after his dog is shot.
- Ep. 254 · Two gunmen attack Buu's home, leading to the emergence of his evil gray alter ego.
- Ep. 255 · Evil Buu defeats Good Buu and absorbs him to become Super Buu