This is a diagram of a Super Saijin:
Requirements to become a Super Saijin:
1.) Must be at least partially Saijin
2.) Must have no tail
3.) Must have powers exceeding those of an ordinary Saijin
4.) Must have a pure heart
5.) Extreme rage causes realization of being a Super Saijin
You may be wondering how Vegeta became Super Saijin because of requirement #4...
Vegeta Says: "I am pure, EVIL!"
i.e. Purely Evil Heart
Also, Vegeta passes requirement #5 because he got mad with himself for not being able to turn SSJ.
