Judging from the thumbnail, I thought that would be Pikachu. It was actually Speedy Gonzales' hat. Whatever, it's great to see these characters all together. I think the Flash would probably win. From what I heard, there was actually a comic where he challenged himself to a race and won. This means he's stronger than anyone else, even himself!
I didn't recognize your artwork at first. This seemed to be less cartoonish than your other stuff. I guess it's because the heads were made with more realistic proportions. It's nice that you tried something different. It worked out well.