I love the custom sprites, and you have something great going here. At first, I was expecting a hunter zero type flash, but you have a unique thing going here, and you have avoided all of my pet peeves of sprite animations. Your animation is great, and I REALLY look forward to the next one.
I love the expressions, especially search man when he sees the bomb. You added a nice bit of humor, including the fact you made Toadman actually worth something. Yeah, he still lost, but all robot masters lose.