Get Metal Charecters in multiplater:
To get metal charecters in the multiplayer matches simply choose the event as usual then you'll need to pick the teams. Once you have done that the origonal 1990's loadin screen will come up whilst it loads the level. When its loading hold the X + Triangle buttons down and don't stop holding them until the entire loading process has finished. You should end up with metal charecters on the team you used the cheat with.
Make Sonic, Knuckles, Shadow, Omega, Amy, Big The Cat, Espio and Vector dance on a rail:
Using any of the characters listed above, jump on a rail. Keep pressing B and it will look like they are dancing on the rail (Note: If someone is near you and you do this trick, they will do they same thing).
(supplied by: DragonHUL)