Ep. 57: Rotom Dex swaps bodies with Wash Rotom and accidentally takes over the Pokémon Center.

57

While Ash and the professors are out shopping, Rotom Dex is left to house-sit. Chaos erupts when a washing machine is delivered by mistake, containing a Wash Rotom. The two Rotom forms accidentally swap places, with the Wash Rotom entering the Pokédex and Rotom Dex ending up inside the appliance. Following a series of accidental form changes and a brief stay inside a television, Rotom Dex longs to return to the comfort of the Pokédex. It eventually succeeds in re-entering the device, but the situation quickly escalates again. After receiving a significant shock from Pikachu, Rotom Dex inadvertently takes control of the entire Pokémon Center, leading to further unintended consequences.