I don't why but Nidorina looks different. Good different. I'm guessing it's the colors. The pose and the dynamic are perfect. and MAN I'm so glad you kept the leftover sketch there. It really gave it a nice touch.
Nidorina is great. In the time when Pokemon weren't called male or female, she was one of my favorites, and still is. The whole evolutionary chain represents a proud, strong female character for me. I feel like something good could also be said about the body type that she represents - she has a certain thickness - but that might be a conversation for another time. Maybe I'm even reading too much into a Pokemon.
Anyway, wonderful work! I like this style a lot, too. She looks fierce!