Pokemon Mario Crossover

I like this piece of artwork!
The green in the background is quite... soothing and not too jarring a colour, with small details such as the pipe and the Question mark block which Mario players will recognize.

To the Pokemon, I think that most of them were quite well matched to their Mario counterparts (Shouldn't Waluigi be Umbreon <img src="e.deviantart.net/emoticons/let…" width="15" height="15" alt="" title=" (Lick)"/>), and the symbols are easily recognizable: Luigi's and Mario's Cap, the Crown of Princess Peach, the Invincibility Star and the mushroom. It's a fun and fairly unique artwork.

Just a suggestion though, perhaps the Facial expression of the Pokemon could be improved on: Waluigi should look slightly more sinister. Perhaps there could be a Bowser and Wario, and Mario and Princess Peach in the middle, with Bowser and Wario looking threatening, Mario looking Brave/Determined and Peach looking Fearful. That would give it a more authentic feel.

Overall, I think that it was executed quite well, and the colour contrast of the Pokemon lends a pleasing feel to the artwork.