Dr. Robotnik/Eggman in Super Mario Kart WIP.

[JackMan]

I like it. A lot.
On the first robotnik though, I notice that one of his eyes is a pixel or two bigger than the other.
And on the modern one, his moustache is.. unshaded. Other than that, though, this is cool.
When you described the three different styles as "modes", do you mean that they're all different characters in themselves, or that they're just, palette swaps, so to speak?
If so, you should edit the first robotnik to have the same design as the sonic 1 eggmobile, the second.. i don't really recall what the AoStH eggmobile looked like, and for the third, you should leave it like that, it looks modern that way.
Other than that... keep truckin' on it. It looks nice.

Edit-
The first one's eggmobile is perfect. The other two's are the ones you should rearrange. Sorry about that.

Edit-Again-
Nevermind the thing about the first Robotnik's eye... i dunno what i was thinking on that one. It's perfect.