From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Potara Earrings (ポタラ イヤリング, Potara Iyaringu) are artifacts of the Kaioshins. These earrings are worn by all Kaioshins as part of their standard outfits. When one pair of Potara Earrings are worn by a single person, they have no special properties. However, if two individuals each wear one earring on opposite ears, the true power of the artifacts is revealed. The earrings have the ability to fuse two people into a single entity, substantially enhancing the abilities of the two single individuals. The resulting fusion lasts forever, even if the fused being removes the earrings.
Potara Fusion is similar to the Fusion Dance technique, however, unlike the Fusion Dance, the Potara Fusion is permanent. An exception to this was discovered when the fused character Vegito allowed himself to be absorbed by Super Buu and was separated into Son Goku and Vegeta, the two individuals who had fused to form Vegito.
There are three known Potara Fusions seen in the series:
- Chronologically, the first was a Fusion between Old Kai and an old witch.
- The second was the Fusion of Supreme Kai with Kibito, which they voluntarily performed to test their Potara Earrings not realizing the Fusion would be permanent.
- The third Potara Fusion was the most prominent. Son Goku fused with Vegeta to form Vegito.
One thing to note about the Potara Earrings is that for whatever reason, people wishing to fuse do not necessarily have to be wearing earrings from the same set in order to do so. In both the manga and the anime, Kibito and Supreme Kai simply removed their left and right earrings, respectively, and before they knew it, they were drawn towards each other and subsequently fused together. Despite this, Kibito's earring (which was blue in the anime) became the color of the Supreme Kai's earring (which was yellow).
Another oddity of Potara Fusion is that, unlike the Fusion Dance, the more dominant spirit of the two fused individuals takes precedence over the weaker not just in looks, but in voice as well. The proof of this is that both Elder Kai and Supreme Kai seem to be the ones in control of their fused forms while having a few noticable traits from the old witch and Kibito, respectively. One could speculate that Goku and Vegeta were matched equally when they fused, which may explain their doubled voice and flawless unison of bodies and clothing.
In both Dragon Ball Z: Budokai 2 and Dragon Ball Z: Budokai 3, Supreme Kai could use the Potara Fusion and fuse with Kibito to become Kibito Kai. Goku and Vegeta both could use the Potara Fusion and fuse together to become Vegito. As a joke in Dragon Ball Z: Budokai 2, Goku and Hercule could use the Potara Fusion and fuse together to become Gokule.
Potara system in the Budokai Tenkaichi series
The game Dragon Ball Z: Budokai Tenkaichi 2 features a character upgrade system that uses different "Potaras" to add special attributes to characters. These Potaras are known as Z Items in the English release. A wide variety of different upgrade types are available, ranging from simple stat upgrades to powerful special abilities. The sequal game, Dragon Ball Z: Budokai Tenkaichi 3, features the same system as Dragon Ball Z: Budokai Tenkaichi and Dragon Ball Z: Budokai Tenkaichi 2, with a new Z Item, the Red Potara Z Item, which substantially increase the powers of the fighters. They have the same abilities as the other Potara Z Items, only compacted into one usage, such as maximum damage, inflicting neutral damage with Blast 2 and Ultimate Blast attacks, recovering health quickly, surpassing limits, using half the amount of energy for Ki consumption usage, and others. Characters with all Red Potara equipped are also called "GOD Characters". Red Potara can only be accessed by the player through cheat devices or by entering passwords to allow access to these characters in Duel mode, though computer-controlled characters will have Red Potara equipped during certain matches in Story mode or Dragon Sim mode.
- In a line by Old Kai, he said that the Potara Fusion was "better" than the Fusion Dance. This leads many to think that Vegito is stronger than Gogeta.