Super Saiya-jin - Level 1

Goku was the first to become Super Saiyan Level 1 in the Freeza Saga.After Freeza killed Krillin, Goku got so mad that it increased his power level significantly and he became Super Saiyan.

To become this form you must be a saiya-jin through your bloodline you must be very powerful and the last thing is that hatred or anger triggers it (example, Freeza kills Krillin, Goku now enraged channels his anger and is engulfed with power) His hair turns gold and stands up. His eyes turn green and you become very strong!

Super Saiya-jin - Level 2

Gohan was the first to reach this stage. He got so mad at No. 16's death that he went Super Saiyan level 2.

You must have the blood line of a Saiyan must be Saiyan or part Saiyan. Must be very strong. This Super Saiyan level is also triggered by anger and hatred.His hair turns gold stands up and grows 2 inch's. His pupils turn green and your power or energy is combined with electricity!

Super Saiya-jin - Level 3

Goku turns Super Saiyan level 3 in the Majin Buu Saga. Goku and Gotenks (Goten and Trunks fused together) are the only Saiyans to reach this stage.

Must be a Saiyan or part Saiyan. Must be very strong. Anger and hatred triggers this stage.His hair grows to about his waist and is a gold color. His eyes turn green and their power or energy is combined with electricity!

Super Saiya-jin - Level 4

This is the most mistaken stage of them all. This stage comes after Oozaru.

I don't really think this is a Super Saiyan stage but it's call Super Saiyan 4 so ill put the information here. You have to be PURE Saiyan. You can't be 3/4, 1/2, or 1/4 Saiyan. You have to be all Saiyan. His tail grows back. He grow's red fur all over his body and his hair turns black and your eyes turn red. This is a lot different. Instead of having green eyes, they have red eyes. And instead of having blond hair, it turns black. This is one hell of a weird Super Saiyan level.