Freeza is one of the evilest people in the universe. All he does is kill people for fun. He took Vegeta away from his father when Vegeta was a little boy.Next he killed Vegeta's father who was the King of all the Saiyans. Soon after that he did his deadly attack the Death Ball on the planet Vegeta which is where the Saiyans lived. While destroying the planet he killed the lower class warrior Bardock who is the father of Goku.Freeza killed all the saiyans because his worst fear is a Super Saiyan to be born and to kill him. Freeza's power is so great that he has to have different stages to conserve energy.When he got to Namek to look for the dragonballs, He ran into some trouble since he didnt realize the true power of Gohan,Piccolo,and Vegeta.He was forced to go to his ultimate stage. Goku came to help the others since the tyrant was to strong and whipped up on him for a while but Freeza can go to %100 which is kinda like another transformation or stage.Freeza's biggest misstake was when he killed Krillin forceing Goku to go Super Saiyan.After that he had his first battle with one and his worst fear came true.
