Want a quick way to destroy someone's hard work on a 1st-gen Pokemon title that's much more devious than simply overwriting their progress? Cut down a tree, walk on top of the newly-bare patch of land, and then save the game. Once it's started back up, the player will be standing on top of the tree, unable to move. That's the ultimate in devious tactics, if that's what you're looking for. Who does this? Who discovered this?