you don't, dummy.
You get the key card from inside the Silph Co. and head to the 5th floor via the elevator.
The card key is located on the 5th floor of the Silph Co. building in Saffron City.
The Card Key is located on the Fifth floor in Silph Co. Clear at the bottom by a Rocket Grunt.
On the 5th floor of silph co.
The Card Key can be found in Silph Co on the Fifth Floor.
The card key is located on the 5th floor of Silph Co in Saffron City.
Its on the 5th floor in the Silph. Co. building.
To get the card key in Pokémon Fire Red you need to go the 5th floor in the Silph Company. You will find the card key after defeating the Team Rocket members.
The Card Key is found on the floor of the fifth floor of the Silph Co. building in Saffron City.
If you want to get the card key, you must use the elevator and go to 5th floor. Then done.
After going through the Silph Tower.
The card key is required for entering the 12th floor of the Silph company to fight team rocket's leader Giovanni