The Time Room

Goku is fighting with Mr. Popo. Goku loses once again. Mr. Popo sends Goku back in time to train more. Tien, Yamcha and Chiaotzu are training by hauling boulders. Tien is upset by the thought that he will never beat Goku again. In the past, he meets the young Master Roshi and his rival, the young Crane Hermit. Goku battles Roshi's master and learns about the concept of spirit energy. Goku learns from their master, Mutaito, how to harness his spirit energy. Back in the present, Tien contemplates visiting Korin's Tower in order to train as Goku once had. During an incident where the Crane Hermit steals Roshi's love interest, Goku gets angry and manages to use his spirit energy successfully. After that though, he cannot reproduce the energy.