Fusion Dance: For successful fusion, two characters of about
the same race, species, height, weight and power level do a complicated
dance. If there are no errors, they "fuse" -- or merge -- and become a
singular being of extravagant power. Should the dance not be performed
correctly, the being will be extremely weak. This type of fusion wears
off in 30 minutes.
Potara Fusion: It has the same results as the Fusion Dance, the characters
must simply wear the Potara Earings and look at each other to fuse.
However, there's one "slight" downfall: the users stay fused forever.
In the Buu saga Goku and Vegeta are able to defuse back to their original
selves after entering
Kid Buu because the laws
of physics differ within Buu.
Namek-jin Fusion: Used by only the Namek-Jin, this fusion
is basically the absorbtion of another Namek. The lead of
the fusion places their hands on the other Namek's chest,
and "absorbs" them, gaining both their knowledge and their
power. This fusion is permanent and the characters cannot
defuse. This is why Kami-sama took the time he did he before
deciding to fuse with Piccolo.
