I love pokemon, one of my favs are in there too! XD (typhlosion)
Anyway. you did great with constructing the pokemon, each one looks so stunning.
The only reason why I gave you 3.5 stars is because many people have done pokemon fanart. With that said, it is still a masterpeice and is quite different from most fanart I've seen.
There is nothing to improve with your technique. I love how you did the anime style with the pokemon and the girl... Pikachu is also a nice touch to the picture too Ther's nothing I'd change about this picture!