You a Yu-Gi-Oh fan?
I've seen various renditions of the M-bot, but never one like this. It's amazing because it doesn't even look like the same character anymore. The best part is probably his claws. Claws are things that I have always been a huge fan of, particularly when they stratch the ground like these do. I like how M-bot is presented with these really sharp teeth. I know it was supposed to look like a dog, but the teeth make it somewhat more shark-like. The silhouette is a nice touch as well.
It's also great how you put the NG background in. Well, it's not the exact skyline, but the blue buildings are just a theme here. It just goes to show you that every part of the picture should be well made. It's always great to see the little mechanics of the robotic creature. I would love to see a flash animated showing this guy in action banning spammers.