King Kai is the joke cracking prankster god who trains only the greatest martial artists who are really deserving. Before Goku arrived at King Kai's to train, the last student had been King Yemma. King Kai is accompanied by his monkey Bubbles, and his superfast, talking cricket Gregory. His small planet is at the end of Snake Way in the Other Dimension. King Kai may be a God, but he is not invincible, nor is he all powerful, as you go through the series you find out that the Gods of the DBZ world are really not all that powerful. They are usually easily surpassed by the Saiya-jin Warriors. But they are wise and able to teach techniques that even they themselves cannot master. King Kai also dies (along with his planet and 2 sidekicks) when Gokou teleports Cell to his planet and Cell self destructs. Not much of a change except King Kai has a halo and no planet.