Goku

Goku a man of unattainable power a man with no limits a man who always triumphs when it is needed Goku starts out in the series as a young boy found in the woods by a martial artist named Gohan. He was full of evil and would not accept kindness until one day he fell into a ravine and hit his head on a rock he being a very strong child survived and became a loving boy. Until one day he looked at the full moon and turned Oozaru (those large ape creatures Saiyans become) Gohan was no match for the creature and was killed but before he died (Goku had returned to his normal form) he told Goku not to look at the full moon. Goku lived in the wilderness alone for a few years with Gohan's Dragon Ball until a 16 year old girl named Bulma searching for the ball found him. He would not give her the ball so she tried to bribe him by saying he could touch her panties Goku refused to touch "her dirty butt" so she decided to get him to tag along with her as a body grad. They soon met master Roshi and got him to give over his dragon ball. Skipping ahead allot Goku grows up and has a child named Gohan after his adopted grandpa. But suddenly Raditzu arrives and reviles that Goku is a saying and the proceeds to easily kicks Goku away and kidnaps Gohan. Goku teams up with his nemesis Piccolo and kills Raditzu and dies in the process. the in the after world he proceeds to king kies place and is trained by him.

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Power levels
at the beginning of Dragon Ball="10"
Ohazoru (big monkey) power level at the beginning of Dragon Ball="100"
at the 22 Tenkaichi Budoukai (world martial arts)="180"
during the fight with Piccolo Daimaou (one that spawned Piccolo)="260"
during the fight with Raditzu="416"
during the fight with Vegita="8,000"
at 4x Kaiouken="32,000"
during the fight with the Ginyu force="90,000"
when fighting Ginyu himself="180,000"
when fighting Freeza="300,000"
at Super Saiya-jin="15,000,000"