How to clone items and Pokemon!
During the saving that takes place when switching the Box, first the Pokémon data on all the PC Boxes is saved, and then the Pokémon data on the player's party. If some Pokémon are deposited in the PC before switching the Box, interrupting the saving process (turning the power off) at the right moment (ideally, before the "S" in the dialog Box appears but after the Box has appeared) causes said Pokémon to be present both in the Box and the player's party.
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