1) Get the card key
Enter the elevator and go to the 9th floor.
Go to the right, then follow the hallway down. You will see a room with a scientist. There is also a teleporter there, go on it.
Go down, and fight the rocket.
then take the thin hallway at the bottom of the screen until you can pick up the card key
2) With the card key
Take the elevator to the 3rd floor.
Go down the middle hallway, and enter the first room on the left.
Take the teleporter there.
You will enter a room where you must battle your rival. After the battle, continue through the next teleporter, and you will be on Giovanni's floor.
There will be 1 more rocket to fight, then you can open the door and face giovanni.
Be sure to talk to the president afterwards to get your masterball.
Chat with our AI personalities
Go to Celadon and get the tea from the old lady. Go to the guard of Saffron and go past with the tea. Go to Silph Corp and clear the maze to get a silph scope and a master ball. The silph scope identifies them.
what maze
you will see mewtwo if you follow the maze you will need strength rock smash flash and surf
Go into her Gym and make it through the maze. She battles with Ghost Pokemon, watch out for the Mismagius.
first go left then go right then go right agen and then take the left the you have to battle a Pokemon called bumzilla then after the way out just apears.