Dragon is the dragon of Earth. He is the first dragon
introduced to you in Dragonball. His special power is
the ability to grant wishes. You colect all 7 dragon balls
(that are found sparsely around the Earth) and get 1 wish.
Shenlon is watched over by Kami until Dende fills his
position. Shenlon has some other wish restrictions. Shenlon
can not kill those stronger than he, and he can not bring
someone back to life more than once.
the dragon of Planet Namek. He also has special powers.
You have to collect the dragonballs of Namek, which are
alot bigger than the ones found on Earth. You must collect
all 7 dragonballs. Then, you can grant 3 wishes. On Earth
you can only grant 1. He is watched over by Guru.