Hello! I'm new to the forums so I hope I'm doing everything correctly. I spent a few hours early this morning working on a redesigned sprite for Pikachu from the original pokemon games, and I'd like to know if there's anything I can improve on! I made this on Piskelapp.com.

Two things I see that could probably use some improvement is the shape of the ears and the anti-aliasing on the tail, but I'm not entirely sure how I can improve on it.

I made a colored version of this sprite in case someone needs to see, but I'll be sharing my grayscale image for the sake of simplicity.