To get the secret key, you can go to nintedo wifi and mystery gift there
You can't. It has to be Platinum. If you get Platinum, you need the Secret Key. You can't get that anymore unless you have an Action Replay.
It's an event-only item.
The Secret Key in Pokemon Red unlocks the door of the Cinnabar Gym. The Secret Key can be found in the basement of Pokemon Mansion.
In Pokemon Platinum you dont get the key from a grunt you get from the detective, before getting the key you have to go talk to prof. rowan in the library .
go on Pokemon Platinum Walkthrough you'll might get the idea.
You can't. It has to be Platinum. If you get Platinum, you need the Secret Key. You can't get that anymore unless you have an Action Replay.
Pokemon event
It opensa secret door in the Eterna Galactic building where you can change rotoms forme.
Already happening............
You will need an event item called Secret Key, then you need to go to Silph Co HQ
you need to go to an event
obtian the mystory event
i think u a secret key before you can change rotoms formes
It's exclusive to Pokemon platinum version.
check serebii.net for info on upcoming events for Pokemon Diamond,Pearl,Platinum.
It's an event-only item.
you need to have the event (dont know what event it is) hope it helped