Secret Plan to Defeat Buu, Its Name Is Fusion! Dragon Ball Kai: Doragon bôru kai : Season 2 Episode 31
TV-14 Fuji TV 24m
Aired: September 21st, 2014 @ 12:00 PM EST on Fuji TV
Understanding that he cannot defeat Majin Buu, Goku teaches Goten and Trunks the fusion technique.
