Dragon Ball Z: Dragon Box

Season 4 | Episode 42 - Goku and Gohan... The Hero Father and Son's Ultimate Level-Up

Dec 9, 1992

The entire world breaks down in a panic at Cell's broadcast. As this happens, the warriors begin their preparations for the Cell Games. Bulma works to repair No. 18 [sic]. At Kami's temple, Vegeta and son await Goku and son. At last, Goku and Gohan finish their training in the Room of Spirit and Time! However, upon hearing about the Cell Games, Goku says that he will spend the remaining time down in the lower realm.