A Master Key.
it opens doors in the secret rocket base in celdon city
one that opens doors
Possibly one key starts the car and another opens the doors.
Many cars have a computer chip in the key - anti theft - it will work on the door and not the ignition.
i think opens some doors in the radio tower or in the undergroun area in goldenrod city
The first key can be found when you defeat Bowser in the Dark World (The first Bowser level) This key opens up the Basement, which can be accessed by going through the wooden doors and going down the stairs to the double doors.
A butler opens doors,serve meals etc in a mansion or a palace
In the basement of the Black-Briar Manor is 2 doors, one locked with "Master". Her key opens this.
The orifices of a newborn
Which fuses for doors on ford transit
4 regular doors and the back opens also.
Try clicking twice on the remote or key, usually the first time only opens the drivers door, the second click opens remaining doors.