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DPbox is a glitch pokemon obtainable in Diamond in Pearl. It only appears when you enter a double battle with 2 K.O.'d pokemon in the first 2 slots, an egg in the 3rd slot, and a completely fine pokemon in the fourth. When trying to switch pokemon, DPbox will not appear as a pokemon in your party. It has no official name, but is commonly called DPbox, for its appearence as a white square with 2 black lines on it. It does not harm the game and cannot attack.