Training Locations
Kami's Place: Located above the clouds
Trainer: Kami
Trained Z-fighters:
Kruillin
                            Yamcha
                            Tien
                            Choutsu
                            Yajirobe
                            Chibi Gokou
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Roshi's Island
Trainer: Master Roshi
Trainded Z-fighters:
Kruilln
                              Chibi Gokou
                              Adult Gokou
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King Kai's Planet
Trainer: King Kai
Trained Z-fighters:
Gokou
                            Piccolo
                            Tien
                            Choutsu
                            Yamcha

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Kaioshin's Planet
Trainer: Kaioshin
Trained Z-fighter:
Gohan
                           Gokou

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Room of Spirit and Time
Trainer: Z-fighter own Mind
Trained Z-Fighters:
Gokou
                             Gohan
                             Vegeta
                             Trunks
                             Piccolo
                             Chibi Gokou