I have created a Pokemon Picross Game (well most of them are pokemon), that allows to play many pokemon puzzles, and also to print them (you can play with Paint or with pencils too).
This is the direct link to the game:
Crucipixel Deluxe V2.2
If you want to know more, you can go on my website:
Feoden Website - Puzzle List
Here you can find a complete description of the game:
Crucipixel Deluxe on Rpgrevolution
some spoiler about the game: