Hi kebbles, here are some of the tiles that i found:
*Edit (Copy link then paste to address bar)
http://fc01.deviantart.net/fs71/i/2010/223/6/9/The_Pokemon_Dawn_Tileset_by_The_Red_eX.png
http://fc09.deviantart.net/fs44/f/2009/159/1/6/Pokemon_Platinum_Tiles_WIP_by_klnothincomin.png
Also, heres an awesome addition to your game. I hope you include this:
White Kyurem
Black Kyurem
[IMG]
Credits to their owners.
Hope you like it.