Go to pallet town and then you use surf in under prof oak house.
You have to defeat a certain Team Rocket Agent and he'll drop the Card Key.
He's on the seventh floor you need the card key to get to him, go to floor 3 use the card key on the left door next to the rocket then go to the portal you should find gary.
You will need to work your way to the basement in the Pokemon Mansion, you will then find the Key.
The tanoby chambers are ruins where a certain Pokemon is lurking to find that Pokemon you must first solve the boulder puzzle in tanoby key once you do that you can find that Pokemon in the chambers.
There's none, unless you mean the statue that opens and closes the gray walls. You just go up to the Mew statue and press 'A'. There should be a reachable one on every floor.
You have to defeat a certain Team Rocket Agent and he'll drop the Card Key.
On the 5th floor of silph co.
He's on the seventh floor you need the card key to get to him, go to floor 3 use the card key on the left door next to the rocket then go to the portal you should find gary.
it's in the instruction booklet
You will find the key to the Gym of Cinnabar Island, From the Pokemon Mansion that is on the same island.
You have to find the key in the abandoned mansion.
You will need to work your way to the basement in the Pokemon Mansion, you will then find the Key.
The secret key is hidden in the basement of Pokemon Mansion which is located on Cinnibar Island.
The key to the gym
you get it by searching for it for yourslf
the key is in the basement
The card key is located on the 5th floor of Silph Co in Saffron City.