Earthlings:Earthlings are just as we are.Earthlings can be very powerfull after allot of training.Take a look at Krillin.He's just an Earthling,but very powerfull. Saiyans:These could be the strongest wariors in sace if they turned into a Super Saiyan. Saiyan are born with lots of power,and they destroy everyone that comes close with 'em. Yardrat Jin:These are the eole from Yardrat.They live on a weard planet. Goku has landed here after the battle vs. Frieza.They know good tricks like intstant-transmission. Namekian:Well,you should know this one.Piccolo is one of them.These Namekians can be very powerfull and turn into a Super Namek.They've got a green skin and lived on the planet Namek. Nameks are very nice peole and they'll help everyone in need.... Challenger:This is the race of Frieza,Coola,King Cold etc.These are born with lots of powers.