Secret Key
Gen IV: The key to Rotom’s appliance room. Gen III: The key to Cinnabar Gym.
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Effect
Used by trainer in the Galactic Eterna Building, on the ground floor, to the left of the TV : Unlocks the secret Rotom room, in which there are five appliances which can change Rotom’s form.
Effects by game
3 gamesA high-tech key that has to be used at a specific location. It emits a special electronic signal to open a door.
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“Secret Key”. Pokémonism. Retrieved [date] from pokemonism.com/items/secret-key.
Item data from PokéAPI, PKHeX and Serebii.