Shenron is the Earth's eternal dragon. When the 7 Earth dragonballs are brought together he arises and grants the user a single wish. When the wish is made he sometimes can't fufil it do the fact that he wasn't designed for it. His creator is Kami. He is created along with the dragonballs to help people but they are miss used more than once. Such as when King Piccolo used them and later destroyed Shenron. He was later brought back to life by Kami. The new Guardian of Earth is Dende and he restores the dragonballs after the saiyans become normal again. The saiyans themselves are brought back by the Earth's dragonballs.