Ep. 257: Goten and Trunks Train in the Chamber While Buu Waits
Aired on February 22, 1995

After Chi Chi is killed by Super Buu, Goten vows revenge and enters the Hyperbolic Time Chamber with Trunks to train. Buu loses patience after thirty minutes and demands an immediate fight. Piccolo agrees to escort him but deliberately takes the longest route to buy the boys more time. He telepathically warns the pair of his arrival so they can prepare. The duo has developed new techniques and a strategy for the upcoming battle. Upon Piccolo and Buu's arrival, Goten and Trunks fuse together to confront the threat.
Episodes
- 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
- Ep. 256 · Buu threatens Earth while Piccolo buys time for the boys to train in the Hyperbolic Time Chamber.
- Ep. 257 · Goten and Trunks Train in the Chamber While Buu Waits
- Ep. 258 · Gotenks attempts ineffective flashy moves against Super Buu before trying a new strategy
- Ep. 259 · Gotenks and Piccolo trap themselves with Super Buu after his regeneration
- Ep. 260 · Super Buu escapes the Hyperbolic Time Chamber and consumes the Lookout inhabitants.
- Ep. 261 · Gotenks battles Super Buu, causing massive destruction to The Lookout while facing time pressure.