Professor Daravon wrote:Deus ex Machina hit it right on the head. I mean, as far as I know, there's no official explanation for this, but that's just kind of the logical assumption that you'd make. Son Goku attained Super Saiya-jin 4 through natural means, using his tail to first reach Golden Oozaru and then further to Super Saiya-jin 4. Vegeta used technology and cheated, so he didn't need a tail.
Thanks for your agreement, but I
must point out something in your message that I can't agree with. Vegeta did not 'cheat' to become SSJ4
Goku was able to become an Ozaru after his tail grew out, then absorbing the Blutz waves off the Earth and became Super Ozaru, then SSJ4.
Lots of people say Vegeta used the Blutz wave amplifier to 'cheat' his way to SSJ4, but that's not true. He no longer had a tail, so he could no longer 'naturally' transform. The only thing the Blutz wave amplifier did was change him into an Ozaru. From
there Vegeta became a Super Ozaru on his own, and then a SSJ4 on his own.
By saying Vegeta cheated using the Blutz wave amplifier, then by the same logic Goku 'cheated' by absorbing the Blutz waves off the Earth.