I have a lot of ideas, but since Marc has taken the liberty of posting some many choices, I'll just put up the few I think we SHOULD DEFINATELY do.
Amazing Island
Custom Robo
Mario Party 7
Pokemon Stadium Minigames
Dragon Warrior Monsters
Pokemon Trading Card Game (Except I need to get the game
)
Mario Kart Wii
Mario Kart DS
Pokemon Diamond and Pearl (no money for tourney, since it's for fun
)
Pokemon R/B/Y
Pokemon G/S/C