Dragon Ball Episode 142: Kami vs. Piccolo
Episode 142 of 153 of Dragon Ball, aired January 25, 1989, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Goku is eager to fight Junior, but Kami fears his inexperience will be his downfall. Hero takes on Junior in the last round of the semi-finals, where his shocking agenda is revealed.