Other source:
Gohan tells Bulma, Trunks, and Vegeta that he’ll be participating in the World Martial Arts Tournament. After Vegeta says that he, too, will enter, Goku suddenly speaks up and says that he will be allowed to come back for one day to compete. Excited, Gohan flies off to tell Krillin the good news. Krillin and his wife, Android 18, each decide to enter as well. Even Piccolo says that he’ll participate. He and Goten begin training.
