What is the Fusion off DBZ

In the Dragon Ball universe, Fusion is the process of merging two separate beings into one, combining their attributes, from strength and speed to reflexes, intelligence and wisdom. When properly fused, the single being created has an astounding level of power, far beyond what either fusees would have had individually. So far, it has been shown that there are at least three different ways to fuse. Namekian variety First seen performed by Piccolo and Nail on the planet Namek, the Namekian version of fusion has two Namekians fusing into one body. In this variety of fusion, one of the Namekian bodies must play host to house the other's powers into his. The host places his hand upon his partner's chest and his partner concentrates his energy (or ki). The end result is blue flames engulfing the non-host and his body disappearing. The largest difference with this type is that once fused, it cannot be undone, not even by methods that can undo Potara fusions (such as being absorbed into Majin Buu's body, evidenced by the fact that Piccolo was found in Buu's body, but not Nail or Kami) Another difference is that both the host and his partner have separate consciences, where the host has control of the body while the partner just watches from inside the body, though they are capable of talking with the host's consent. It is also possible to merge with more than two Nameks, though it seems the non-host ceases to exist as a body, seeing as how the Dragon Balls turned to stone when Kami and Piccolo merged. Fusion Dance
A dance developed by an alien species called the Metamory which Goku learned in the Other World. It was first introduced when the threat of Majin Buu emerged. The dance results in a completely new merged being with characteristics from both mergers. The newly fused body is dressed in a dark colored vest lined with light colored linen, white pants with a cloth belt and boots. The Fusion only lasts 30 minutes. There are certain requirements to the Fusion Dance as opposed to the Potara Earring fusion. The mergers have to be of the same species (I.E. two Saiyans), as well as having equal power and similar height. Known users

• Goten + Trunks = Gotenks
• Goku + Vegeta = Veku (Fat Gogeta)
• Goku + Vegeta = Gogeta
• Tien + Yamcha = Tiencha (Playable in Budokai 2)
• Krillin + Piccolo = Piririn (Shonen Jump issue #13)

Potara Earrings
These are the earring that the Supreme Kais wear normally. These earrings combine both merges into a new being with complete attributes in the final product all the way down to their clothes. Supposedly this fusion is far more powerful than the other two in terms of power(and will allow for advanced transformation states such as Super Saiyan forms to be accessed even after the fusion, though the Old Kai comments that they could technically merge whilst at full power in the state, but it will shorten their lifetime significantly from being unable to fall out of the form), but merged beings stays together forever and will never be able to break whether the two like it or not. The only exception is when Vegito was absorbed into Majin Buu's body which has a completely different environment from the rest of the universe, its magical qualities dissolving the fusion, which does not seem to affect Goten and Trunks' Metamorese fusion, into Gotenks. Known users

• Supreme Kai + Old Witch = Old Kai (Permanent)
• Supreme Kai + Kibito = Kibito Kai (Permanent)
• Goku + Vegeta = Vegito (Permanent, but Reversed within Majin Buu's body)
• Goku + Hercule = Gokule (Unknown, Playable in Budokai 2)