Super Saiyan 4 Vegeta

Bulma used the blutz wave amplifier as a substitute for the moon and used it on Vegeta. These waves ran through Vegeta's veins, forcing his tail to grow back, which is necessary for a Saiyan to transform into a Great Ape. With his tail back, like Goku, he was able to transform into a Great Ape. His enormous power allowed him to then transform into a Golden Great Ape, and then, upon gaining control of himself, he transformed into a Super Saiyan 4 (skipping Super Saiyan 3). Vegeta's features are quite different from his previous forms. His hair style changes, becoming longer and more wild. His hair becomes dark brown, and extends to his shoulders, his eyes are aqua-colored, and he has red fur on the upper part of his body.

In CAMEO!
Super Saiyan 4 Vegeta is confirmed to appear in CAMEO! as a replacement for Vegeta.