There are 4 hidden characters in Super Smash Brothers. They are Luigi, Ness, Captain Falcon, and Jigglypuff. Here is how to unlock them. Luigi: finish bonus 1 practice with all of the initially available characters, then defeat him to unlock him. Jigglypuff: Finish 1-player mode with any character. Captain Falcon: Finish 1-player mode in under 5 minutes. Ness: This one's a toughie. You have to finish 1-player mode on normal difficulty with 3 lives and no continues. then defeat him. Mushroom Kingdom stage: Finish 1-player mode with all 8 initially available characters. Careful the pirahna plants bite! But the really cool thing is that you can go down the warp pipes!! Item Switch: I' actually not sure, but I think you have to play a certain number of VS. matches. How many, i don't know. Just keep playing VS. matches until you see a message telling you that you can access the Item Switch. There are probably more secrets to be found, I just havent found them yet.