This page has links to all sorts of fun sites dedicated to the little portable creatures, in order of importance to your Trainer career. Take a gander!
The definitive source for all things Pokemon! If you have a question that's Pokémon-related, the answers are here!
Pokestation is something of an authority site when it comes to Pokemon hacks.
The site where I created/downloaded all the PKMs seen on this site! It's basically an online Pokésav with a more graphical interface.
Just a fun MMORPG I found. Try it; it's highly addictive!