For this “game” (it’s a little too simple to even be called that), Knife Guy juggles two balls and you have to pick the ball he is holding. To earn the membership card for Grate Guy’s Casino, you have to play Knife Guy’s juggling game and win at least 12 times. Climb up the tower until you reach a portion with a staircase that bends around the screen. Knife Guy is located in Booster Tower, though he only appears there after you beat him as a boss during the main story.

Even if you find the casino, you can’t actually enter it until you earn a membership card from Knife Guy. Once there, you can immediately enter Grate Guy’s Casino – as long as you’re cleared to, that is. From there, follow the path off-screen and you’ll pop back into the World Map. Defeat it, and then jump three times under the platform shown above to make it appear. In this new room, you’ll find a Golden Chain Chomp. In the area with the Beezo and all the Piranha Plants, take the top pipe. The path to Grate Guy’s Casino is hidden inside a pipe in Bean Valley, one of the later areas in Super Mario RPG.

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