Inside the Game Corner you can find a total of 250 coins using the Item Finder. Each slot machine has a varying win/loss ratio so be sure to experiment until you get to one you like.
At the top of the screen, you'll find a Team Rocket member in front of a poster. Beat him then search the poster to open a secret entrance to the right.
There are 4 floors to the Game Corner's Team Rocket hideout. Check all of the rooms to make sure you get all 12 items from the PokéBalls scattered throughout the place. There are 10 rocket members as well as their leader, Giovanni. To open the gates to the elevator, beat the Rocket in the 4th basement and then talk to him afterwards. When you go to confront Giovanni. Jesse And James Will Fight You. Then you can go confront Giovanni and recover the Silph Scope.
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