Dragon Ball Z - Season 8 Episode 23 -

Goku begins training Goten and Trunks in the difficult art of Fusion. Gohan is healed in Supreme Kai's world, and tries to remove the legendary Z Sword, which can be used to fight Majin Buu. All the while, Babidi and Buu continue terrorizing innocents to "smoke out" Piccolo, Goten, and Trunks!