Not bad at all really: looks colorful, has a cartoon-ish style, & well detailed with the mechanical parts. My only complaint is the robots I've never seen before, are they Robotic-Counterparts of existing characters or Original Robotic Characters? I only know of Metal Sonic & his Monsterous Form.
Okay, this is epic.
Metal Sonic Maniaaaaaa :D
This is art
This is epic! And if this was sold as a poster I'd buy it, the metal from sonic 2 has only one eye but the design of it somehow works, it's odd. Sonic's eyes generally speaking have always been a weird looking feature, anyway, can't go wrong with this piece. Keep it up!
Man, I continue to admire the great linework you carry in your works, there's a lot of character in the hatching and ao shadows that feel so comic-y. I super dig upper left and metal overlord the most, it'd be really cool to see you do a cover/ or even a full issue in your style