I've actually lost more games than I have right now. Let's see. Lost two Yellows, three Golds, two Silvers, a Crystal, a Ruby, a Sapphire, an Emerald, two FireReds, three LeafGreens, a Diamond, a Pearl, Blue Rescue Team, and Explorers of Time.
I wonder how much money that is?
As long as I've been playing the games, I've lost a bunch of the different ones over the years. I think the first one I lost for a long time was crystal, which went missing for a few years. I bought a new one and then one day found the old one wedged deep down a chair cushion. Lost the original pokemon pinball game, bought another one and then the first copy of that one too eventually. Sapphire version was lost a number of years ago and is the only one that I've still never located.