Where is the Grate Guys Casino?
Well, after you beat the Grate Guy and Knife Guy, and the bundt cake at Marrymore, go back to Booster’s tower. Climb to near the top where you see Knife juggling balls. He’ll ask you if you want to play a game. Watch closely and try to guess which hand the yellow ball is in. Do this 12 times. After that, you should get a bright card. Go to Bean Valley and go to the area with 5 pipes. Go down the pipe closest to the save block. Go to the upper corner where the chomp chomp is, and jump 3 times. A platform should appear. Jump on it, go to the exit, and you’re there!