1. Fusion Dance
This fusion lasts 30 minutes, and is done by a weird dance. and at the
end the two people touch fingers. Both people must be reletively the same size and have the same power. Their leg angles, and arm angles must be exactly alike. So
basically they have to do the exact same thing. If one of the people do one tiny thing wrong you can end up as a fat gogeta or skinny gotenks. The combined power is much greater than the original.
2. Potara Earings
This fusion lasts forever and is alot easier than the fusion dance. All you have to do is wear the potara earing on opposite ears and you'll fly together and form one.
3. namekien fusion
This fusion is only seen when piccolo and nail join together and piccolo and kami join together. One of the nameks place their hand on the other one's chest and they instantly fuse.