*loads gun*
I've never been a fan of the Game Corner as I don't find their items very useful. However, I did enjoy the D/P Slot Machines. Got the Explosm TM a few times, too. But why they replaced it for the Voltorb Flip game is beyond me. People won't get addicting to the slot machines because it's in a game for all ages.
Though a Slot Machine with Clefairy/Ditto in it wouldn't be a bad idea.