Bonus Songs Successfully complete Showtime mode weel to unlock China Grove, In The Midnight Hour, and Snake Eater (from Metal Gear Solid 3).
Cheat Collection 1 Successfully complete at least one song with a "Platinum" rank in each venue in Showtime mode to unlock the "Cheat Collection 1" option. Then, select the "Cheats" option at the "Extras Menu", select "Cheat Collection 1", then enter one of the following codes to unlock the corresponding cheat option. If you entered the code correctly, you will hear a sound.
Big eyed character: Press Circle(2), Square(2), Down, Left, Left, Down.
Cheat Collection 2 Successfully complete all songs without a "Gold" or "Platinum" rank in each venue in Showtime mode to unlock the "Cheat Collection 2" option. Then, select the "Cheats" option at the "Extras Menu", select "Cheat Collection 2", then enter one of the following codes to unlock the corresponding cheat option. If you entered the code correctly, you will hear a sound.
Big head character: Press Circle, Square, Circle, Square, Up, Right, Down, Left.
Fish microphone: Press Square, Down, Up, Left, Square(2), L2, L1.
Cheat Collection 3 Successfully complete all songs with a "Gold" rank in each venue in Showtime mode to unlock the "Cheat Collection 3" option. Then, select the "Cheats" option at the "Extras Menu", select "Cheat Collection 3", then enter one of the following codes to unlock the corresponding cheat option. If you entered the code correctly, you will hear a sound.
Cheat Collection 4 Successfully complete all songs with a "Platinum" rank in each venue in Showtime mode to unlock the "Cheat Collection 4" option. Then, select the "Cheats" option at the "Extras Menu", select "Cheat Collection 4", then enter one of the following codes to unlock the corresponding cheat option. If you entered the code correctly, you will hear a sound.