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 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. 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.