Hedgehog color is determined by a number of factors -
Visit the link below to see a hedgehog color guide.
What color is a hedgehog
Manic the Hedgehog is green.
actually he is a hedgehog like sonic but a diffrent color
They are usually brown or white.
A hedgehog with no pigment (color) in its skin or quills. They are white with pink eyes and nose.
egg plant or magenta
Green
The average length of a hedgehog is about 8 or 9 inches (about the size of a guinea pig), sometimes smaller. The weight is harder to tell, because each hedgehog is different.
Wikipedia.org or Sega.com
the hegdehog is most likely to be manic the hedgehog
Yellow Hedgehog? Well, you know there is a white hedgehog and that he's Sliver the Hedgehog! Unfortunately, he is sliver in color. Sorry. Also that you must be mistaken with Super Sonic as in the Yellow Hedgehog but that's only in his super transformation. So most likely, there is no Sonic character that, I know of, is a Yellow Hedgehog. Accept my apologies, senior.
Not really, his head would be the hedgehog. Put some little feet and a stubby tail, shrink his eyes and mouth, then color him brown, THEN he would be a hedgehog.