Although Vegeta has never achieved a Kaio-ken like Goku, he has reached similar levels of power through his own means.
You might ask: Why not just play Xenoverse 2 or FighterZ?
Because official games have limits. Dragon Ball FighterZ only has Base, SSJ, SSGSS, and Majin. Xenoverse limits you to CaCs. vegeta all forms jus mugen
M.U.G.E.N has no limits.
In a "Vegeta All Forms Jus Mugen" build, you can: Although Vegeta has never achieved a Kaio-ken like
Yes, with caveats.
Pros:
Cons: