Ok, to get Mario you must have 8 stars. Go to the Princesses play room and then walk into 8 star room. jump in the Mario panting. First, fight your way to the giant vine. Climb up and then jump into the tree with a hole. Then fight the Goomboss to get Mario's key. For Luigi, You must have Mario. Go to the garden and defeat the Big Boo. jump in the cage and go in the mansion. You have to beat a giant boo first, and then go to some room on the second floor. Go to the stage and get the power flower in the ? box. Float to the top and go in the door. Jump in the Luigi Painting. The rest I cant describe, you'll have to find it. For Wario, you need Luigi and have beaten Bowser two times. Go to the top of the castle and go in the door with the hallway by it. Get the power flower and walk through the mirror. jump in the Wario painting. I didn't get him yet, so just fight your way until you get to the big Bully. Beat him three times and then you'll get Wario's key. For the ? switch, you need to go to the light and look at it. if it says, 'A voice from above is saying, "hey, Mario" ' Your obviously doing something wrong. You have to be Mario, and then press x and look up. You'll find that the other cheats are telling the truth, YOUR just doing it wrong. I'll look for more secrets and everything. Send me a PM if you want anything.