Author Akira Toriyama is renowned for the rich resources he utilizes in each of his works to resolve various plot points. This is particularly evident in Dragon Ball, given its expansive universe and the diverse adventures of the Z Fighters.
More than 40 years after the release of Dragon Ball, fans still eagerly anticipate every detail about the franchise. However, the adventures of the Z Fighters feature many unique characteristics, making it common to discover new elements, especially regarding events that occurred over three decades ago.
One of the noteworthy aspects is the introduction of the Potara earrings. According to what the Dragon Ball creator mentioned in a recent interview, this technique appears as a source of power that he uses to escape from complex situations.
First, let’s explore the concept for those who may not be familiar with it. In the latter part of Dragon Ball Z, a divine character makes an appearance, someone with power exceeding that of Kami-sama. That is Kaioshin, along with his assistant Kibito. Both characters wear earrings, which we later learn are referred to as Potara earrings.
Prior to that, Dragon Ball Z had introduced another fusion technique known as Fusion Dance, but it required two individuals to have equal strength and to perform a specific dance in sync. Thus, the resulting warrior would possess power significantly stronger than each of the original fighters.

From the story’s context, we understand that the Potara earrings possess the ability to fuse two beings together, provided both wear one of each earring. This method is both quick and powerful, with the only requirement being that both parties must wear the earrings of Kaioshin. When fused using the Potara earrings, the new warrior created does not need to have similar power levels; anyone can fuse.
How the Potara Earrings Were Introduced in Dragon Ball Z

Akira Toriyama once confessed that the Potara earrings were initially intended as mere accessories. However, at a significant turning point in the story’s development, he felt the need for a new technique. When he saw the earrings being worn by Kaioshin and Kibito, he decided to use them as a fusion method.
“I was wondering what to do. I always thought of earrings for Kaioshin, so I thought, ‘Maybe I can find a way to use them.’ Up until then, they were just ornaments,” Akira Toriyama admitted.
Source: Fayerwayer