Dragon Ball GT - episode 33 - 14 Jan, 1997

After numerous failed tries, Goku ties Elder Kai to a rock and tells him to hold on to the pliers. He flies away as hard as he can, which pulls his tail out to full length and Goku has enough energy to stop Baby as Kibito Kai begins to teleport Goku to the Tuffle planet so he can confront Baby. Back on the Tuffle planet, Majuub creates a giant energy wave and aims it at Baby. After a long struggle, Baby is able to deflect the wave back at Majuub, turning him into chocolate, and eating him. Goku arrives (fueled by the loss of his trusted partner) and powers up to Super Saiyan 3. But even with his tail back, he does not seem to have gained any strength. Goku then charges at Baby, but the evil Tuffle grabs him by his tail (golden while in Super Saiyan 3), toss him around in the air and throws him back to the ground, badly injuring him and causing him to regress back to his base form. As Baby prepares to deliver the final blow however, Goku looks up at the Earth (in place of the full moon) and transforms into a Great Ape: this time with golden fur (Super Saiyan Great Ape). (Source: Wikipedia)