Fusion

There are some rules to the fusion of DBZ. There are two different types of fusion one is the dance of fusion and the other is earring fusion
Dance Fusion
Goku learned of this fusion after the end of the cell game. They must perform a dance and the must be a mirror like of each other. When this is performed right the new fighter has the abilities of the two fighters and is greatly stronger than the two warriors split.
Requirements
The two fighters must be similar in size and power. If one power is greater they can lower it to match the other person power.
The fusion only last 30 minutes, after that time the fighters will return to themselves and there is no way to end it before the time is up for the fusion.
The dance must be performed right absolutely no mistakes in it. If it is not done right by either fighter the fusion is defective.
After the fusion the fighter have to wait one hour before they can do it again.
Earring Fusion
The fusion technique is of choice for Kaioshins which time forgot about. This method of fusion is hundreds of times better than the Dance Fusion. For this fusion to happen two people only need to wear the ear-rings of Kaioshin.
Requirments:
A set of Kaioshin earrings.
The two fighters involved in the fusion must wear the earrings on opposite ears
The effect of the fusion is permanent.
Each person can only have one such fusion in a lifetime. (the properties of this fusion don't not apply in a magically being such as Buu.)