Dragon Ball Z - Goku turns super saiyan for the first time

Dragon Ball (ドラゴンボール, Doragon Bōru) is a Japanese manga series written and illustrated by Akira Toriyama. It was originally serialized in Weekly Shōnen Jump from 1984 through 1995, and later the 519 individual chapters were published into 42 tankōbon volumes by Shueisha. Inspired by the Chinese folk novel Journey to the West, it follows the adventures of Son Goku from his childhood through middle age as he trains in martial arts and explores the world in search of the seven mystical objects known as the Dragon Balls, which are known to grant any wish. Along his trip, Goku meets several friends and fights against several villains who plan to get the Dragon Balls to grant their wishes and some who aim to conquer the world. (...)

DBZ 80 - Transformed at Last

Goku, enraged by his Krillin's death, turns super saiyan for the first time on planet Namek.