I have Red, Blue, Yellow, Gold, Silver, Crystal, Ruby, Sapphire, FireRed, LeafGreen, Emerald, Diamond, Pearl, Colossuim, XD, Ruby Sapphire Box (storage for Pokemon), Japanese Red and Yellow versions, all Pokemon Mystery Dungeon games (Red Rescue Team, Blue Rescue Team, Explorers of Time and Explorers of Darkness), Trozei, Ranger, Puzzle League, and have Pokemon Snap download to my Wii from the Virtual Console.
Just going a little off topic, I even have every Pokemon movie and have some of the seasons of the show on DVD: Season 1; all three volumes, Season 2 Box Set, Season 5; both volumes, and Season 6; both volumes.