Evil Kai was the kai before supreme kia.He was believed to be more poweful than super saiyan 3. He made a preview in Dragon Ball TR and takes over a alternet universe and alternet Gohan came to Earth and begged the Z-Warriors to come to the alternet universe.
Evil Saga
Episode1
Another Universe?
Hey goten ,want to come to the Capsule Corp? Sure dad um....is trunks gonna be there? Of course he is,why?
Ever since I lost that fight i've been mad at him. Come on you'll have fun.I guess I'll come.Okay that good I kind of owe Bulma some Zinni hehe. Whatever lets just hurry up.
Ok where here Goten......Goten! Oh well its not like he's gonna get in trouble .Ok I need to to find something emmbarising about Trunks.Hey whats that in the sky?