Okay, so it's basically a pokemon set. It's about 570 walls and it features everything up to 3rd generation, including some shinies.
You can download it via demonoid here.
If you don't have demonoid, you can megaupload it here.
You will need Winrar to open the .rar file. That's not a problem; just go here! WINRAR
The images are all high quality.