Why can Sonic become a Super Saiyan like Goku?


I watched an animation about Sonic, and that hedgehog became a Super Saiyan
using diamond shaped stuff.

What actually is that? How can Sonic become like that?




I think you're refering to what's commonly known as [Super
Sonic](http://sonic.wikia.com/wiki/Super_Sonic).

[![Super Sonic from Sonic
X](https://i.stack.imgur.com/Jgsgf.png)](https://i.stack.imgur.com/Jgsgf.png)

Sonic has had the ability to turn into Super Sonic using [Chaos
Emerald](http://sonic.wikia.com/wiki/Chaos_Emerald) since the 2nd game.
Various media have handeled this transformation in various ways (see the
Wikia-page linked above), but in general he's seen as a yellow or golden
version of himself. He usually gain enhanced speed and an ability to fly
and/or to survive in outer space. At least in the games, this is often at
expense of [Rings](http://sonic.wikia.com/wiki/Ring).

The transformation is _not directly linked_ to Super Saiyans, but it's widely
believed that the game drew heavy inspiration from Dragon Ball in this regard.
(No official confirmation, tough.)

