Sonic: You're done Robotnick!
Robotnick: That's what you think rodent!
*Sonic spin dashes through Robotnick's machine thing causing it to blow up*
Sonic: Yay! *Runs away*
Here it is, as promised I colored the sketch posted earlier.
I know the coloring/shading is messed up a little. And my scanner didn't really help very much either. The explosion turned out cartoony, which is what I was going for.
Sonic (c) SEGA
Art (c) me