Tenkaichi Budokai Announcer:
This guy announces all of the Tenkaichi Budokais in the series.
Namu:
Namu appeared in the 21st Tenkaichi Budokai, when he was fighting to buy water
for his village. Roshi gave him a capsule to carry water in in return for
dressing up like him so no-one would suspect he was Jackie Chun.
Snow:
Snow rescued Goku in the Red Ribbon saga of Dragon Ball when he was frozen,
and Goku went to beat up the Red Ribbon and save her village as thanks for
saving him.
Bora and Upa:
These characters appeared in the Red Ribbon saga in Dragon Ball. Bora is an
indian who lived in the Karin Sanctuary with his son Upa. He was killed by
Tao Pai Pai, so Goku went after him to wish Bora back to life with the Dragon
Balls Tao Pai Pai had stolen from him. Bora gave Goku the 4 star Dragon Ball
he was looking for.