Why Didn't Goku Black Use Kaio Ken in His Super Saiyan Rose Form?

In the immensely detailed and conflicted universe of Dragon Ball, the choice of Goku Black not to use Kaio Ken in conjunction with his Super Saiyan Rose form leads to numerous discussions and theories within the fan community. From physical limitations to character philosophy and narrative choices, there are several factors at play.

Understanding and Mastery

Firstly, while Goku Black is a version of Goku (although with some unique alterations), he might not possess the same level of mastery over techniques as Goku himself. Goku's use of Kaio Ken requires a high degree of precision and understanding of his body's limits, which Goku Black may not fully possess. This difference in mastery could be a significant reason why he chose not to use the technique.

Physical Strain

Secondly, the immense strain that Kaio Ken imposes on the user, especially when combined with high-power forms like Super Saiyan Blue or Super Saiyan Rose, is another factor to consider. Goku Black would likely be aware of the risks and potential drawbacks associated with such a technique. The strain could weaken him or leave him vulnerable, which might make him prefer to rely on his unique abilities and the pure power of his Super Saiyan Rose form.

Character Philosophy

A third factor is Goku Black's character philosophy. His character is heavily influenced by Zamasu's ideals, which emphasize a disdain for mortals and a belief in the superiority of his own power. He might see Kaio Ken as a technique tied to Goku's mortal nature, and thus, not worthy of his use. This reflects his broader disdain for Goku and everything he represents.

Narrative Choices

Another angle to consider is the narrative perspective. The creators may have deliberately chosen to differentiate Goku Black's abilities from Goku's to establish his unique identity as a villain. If Goku Black had used Kaio Ken, it might have blurred the line between him and his former self, making him feel too similar to Goku. This would undermine the narrative contrast between them and the distinct nature of their respective "flavors" of Saiyan power.

Power Scaling

Lastly, the Super Saiyan Rose transformation is already a powerful transformation, and Goku Black may have felt that it was sufficient for his goals without needing to stack additional techniques like Kaio Ken. This choice may also be part of maintaining the power balance, ensuring that each form and transformation has its own unique potency and form.

While Goku Black had access to knowledge of Kaio Ken, a combination of personal philosophy, physical limitations, and narrative direction likely significantly influenced his decision not to employ it. The overshadow of Goku's power and control over techniques like Kaio Ken, combined with his own unique origin story, all contribute to this missing piece in the rivalry between these two powerful Saiyans.

In conclusion, the decision by Goku Black not to use Kaio Ken in his Super Saiyan Rose form is a nuanced choice influenced by a variety of factors. Whether it's through physical strain, character philosophy, or narrative considerations, each element plays a vital role in shaping the complex interactions and power dynamics of the Dragon Ball universe.