Make a Pokemon MMORPG. It would be amazing if you can do it correctly. I'm not talking about a shitty Pokemon game with "online trading potential." I'm talking about a HUGE MMO with zones, servers, PVP servers, guilds, an electronic economy, and quests. Like WOW. WOW with Pokemon.
You could have 3 different starting cities for all players. Each starting city has a Pokemon Professor who gives you your first pokemon (I.E. Charmander, Squirtle, and Bulbasaur.) Players then run around the zones, leveling their pokemon, while catching new ones like Caterpies and Weedles and Marmadukes...cuzz they gotta catch em all. This is what all MMO's are all about. Constant leveling and grinding. And people would play the shit out of the game until they caught every single pokemon....and thats when you bring out the expansion packs with the NEW pokemon.....see....you'd make billions.
The players would get their pokemon to high enough levels to fight Gym Leaders and eventually the Elite 6. And think of the PVP possibilites. There would be players fighting pokemons all over the place. And if you even worked in a way for players to Play Team Rocket....forget about it. its GOLD.
Oh...whats that? How do we handle the legendary pokemon? Like Mewtwo or Articuno or Cthulhu? Well, make it so only ONE person per server can have that pokemon at a time...and if they lose a battle...it goes to the winner. It would be CHAOS...SCREAMING BLOODY PVP CHAOS!
There are still a lot of details to work out....but seriously...you could kill WOW with this idea. You could kill WOW and wear its entrails as a hat...that is...if you do it correctly.
Let me know what you think, Nintendo.
I am free to start working on this project right now.
P.S. To show I am a true fan...I've enclosed a picture of my Cubone collection.