just go to the highway (C3), go towards right the very end and there.
You find the red key card when you chase the thief on the scooter. You don't use it right away. The key card opens the door to the Black Widow's art room, where you complete the game. (You need the key from the curator of the Museum to track her down.)
When the Black Widow catches you , you will have to pass the guard and at top you will use your card
you cant get it unless you use a cheat device because it was at a special megaman distribution event
the one in the right, you need to have the card key
After you are in the Widow's lair, you can use it to open the final door to her trove of stolen art.
use water type cards to defeat leo
use the lift key to use the lift
I think you use it in th ebuilding with team Rocket to open certain doors if you walk up to them and push B
You get the Key Card after the scooter chase. You cannot use it until much later. Return to the museum to receive a package. In the Black Widow's lair, the guards are patrolling, but you can reach the locked door to her treasure vault (use the key card to open it).
go tothe fifth floor go down and round and you will find a card key goto floor 3 and use card key use the teleport and teleport again then useyour key card
If you want to get the card key, you must use the elevator and go to 5th floor. Then done.
What you can do is use a credit card. That's what I use.