I'd assume you want some constructive criticsm and not only those "you're so great"-comments. So, I thought I'd constructively criticize you. However, there's a slight problem: I can't find much to criticize!
The first thing I'd say is that you should colour some of your work, maybe with computer, so you don't lose the original. You draw well, but let's face it: colours make stuff look better. For a very long time, I coloured practically nothing, and that's why colouring remains my issue. If you're not very great in it, you should start practicing. If you are great in it, you should colour these drawings. If you already have coloured them, I'd like to see those coloured ones!
The only not-so-well-drawn things I could find: the head of the second Pikachu and May's hand and nose. Everything else is great, I expecially like the way you draw faces (of both people and Pokémon) and the way you invent your own poses and don't just copy some Pikachu pictures you found in the internet. Generally all your drawings look great and you shade well.
I think drawing more is pretty much the only way to get better in your case. I'd really like to see more of your work!