Potara Earrings are artifacts of the Kaioshin (Supreme Kais). These earrings are worn by all Kaioshin, 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 both individuals. The resulting fusion lasts forever, even if the fused being removes the earrings. However, there is one instance where the Potara Fusion will be nullified and restore the fused being back to their original forms, which is when they are sucked into an environment that wouldn't support it (as seen with Vegito being absorbed into Super Buu).
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 Goku and Vegeta, the two individuals who had fused to form Vegito.
There are five 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 first Saiyan fusion. Goku fused with Vegeta to form Vegito.
- The fourth was Goku fusing with Hercule to create Gokule, in a desperate bid to defeat Maceza.
- The fifth was Vegeta fusing with Future Trunks, forming Vegetunks.
One thing to note about the Potara Earrings is that for whatever reason, people wishing to fuse don't 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 video games
In both Dragon Ball Z: Budokai 2 and Dragon Ball Z: Budokai 3, Supreme Kai could use the Potara Fusion and fuses 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.
- Zarbon wears earrings very similar to the Potara earrings.
- In the episode "Buu's Reincarnation", a man bearing the same symbols as Nok in the audience of the 28th World Martial Arts Tournament wears an earring on his left ear that is very similar to the Potara earrings.
- A curiosity are the voices of the potara fusions. The Supreme Kai and the Old Witch who made Old Kai, and Supreme kai and Kibito made to Kibito Kai both had normal voices, but Vegito, the potara fusion of Vegeta and Goku, has the two voices at the same time, not just one as Old Kai and Kibito Kai.
- 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. However, this may just be embellishment on his part.