Can a human achieve Kaio-ken?

Kaioken is a technique created by King Kai that few warriors get the chance to learn, with Goku being the most notable user. In the game, however, it is naturally learned as a racial development of power. ... Despite this, only Humans learn it in-game.

Can krillin go Kaio-ken?

Krillin also learns the technique from Goku in his what-if saga in Supersonic Warriors. It should be noted that Krillin being able to use the technique is likely attributed to his skill when it comes to ki control. However, neither Tien, Chiaotzu, or Piccolo have ever been shown using the technique in any media.

Can a human Go ultra instinct?

Through intense training, a human can, in theory, achieve Ultra Instinct form, managing to surpass Goku's Super Saiyan God form and gain power on par with the Gods of Destruction themselves.