Alright, these facts, non-interested people may know, and others interested people should defiantly know after watching Dragon Ball.
#1 - The Main Characters Name is Goku (Obviously)
#2 - Goku is from another Planet
Goku is not human. He is from a race known as Saiyan's, and his races planet, is called Planet Vegeta.
#3 - Goku wasn't always a nice kid
Saiyan's are known to be aggressive and mean. No matter how hard Gohan tried to look after Goku, and teach his right from wrong, Goku disobeyed and wreaked all sorts of things. One day Grandpa Gohan was carrying Goku in a basket on his back, and Goku being reckless, fell into a deep, deep ravine. Goku miraculously survived, but hit his head quiet bad. This lead to him forgetting his mission on Earth, and he became a kind hearted boy
#4 - The first person (human) Goku accidently killed.
As a baby, Goku was sent to Earth, to destroy it. The Saiyan race, would go around and destroy all life source, to sell it to Frieza, (a great enemy). So a weak planet like Earth, are sent a baby to deal with it. So Goku was sent, and was found by a nice man, Gohan. Saiyan's have the power to transform into an ape at the sight of a full moon, and this lead to him accidently stepping on his Grandpa one night.
#5 - Bulma deceived Goku.
At the very start of the series, Bulma was in search of the seven Dragon Balls, and already had two in her possession. Goku refused to hand over his Dragon Ball to Bulma, so Bulma told him if he teamed up with her, they could be partners, and Grandpa Gohan would be really pleased. Though we can't forget how nice, helpful, and smart Bulma is-