Since the event for the secret key is over, there is no way to get it other than hacking. And no, you can't trade it from a friend since it's a key item.
No, you can't mix records in Pokémon Platinum in order to get the Secret Key from a friend.
My Secret Friend was created in 2008.
Secret Friend was created in 1980.
The duration of The Secret Friend is 900.0 seconds.
The Key The Secret was created in 1993.
The Secret Friend was created on 2010-06-27.
you have to answer the tv guys questions with some special words i forget what they are look it up and you have to have wifi or a friend that has one
there is no key
No secret except for genetics.
the secret key is in the Pokemon mansion - Celadon city basement
No such thing. Theres a Secret Place and Secret Key.
The Secret Key that you get in the Pokemon Mansion is used to enter the Cinnabar Gym.