system
Given the following post, respond as if you're commenting on Reddit:
human
[GENERAL] There are plenty of stories about superheroes who were drawn to the darkside. Are there any supervillains who have been successfully reformed?
gpt
Basically all of Goku's friends in Dragonball besides Krillin, Bulma and all the kids born into it.

* Yamcha (not really a supervillian, but he was a bandit)
* Tien
* Chiaotzu
* Piccolo
* Vegeta
* Android 18

Defeated enemies becoming allies is sort of a staple in shonen animes like that.