checked-part ->Maniac Mode Costumes: As you progress through the game, you'll unlock a variety of costumes and wigs for the lady you're chasing throughout the game. As you earn more stars and find more hidden rabbits in the cut scenes between levels, you'll unlock more and more of these accessories. By the time you've collected 182 stars and found 60 rabbits, you'll have unlocked nearly everything. Beat Hell Mode to unlock the last few wigs. =>GBA Costumes: Having various GBA games plugged into the GBA cartridge slot will unlock extra costumes. All of these will also be unlocked if you complete Hell mode. * Sonic Advance 1 or 2 - Unlocks head 17 (Sonic). * Sonic Advance 3 - Unlocks head 18 (Chao). * Puyo Pop - Unlocks head 19 (Puyo). * Sonic Pinball Party or Chu Chu Rocket - Unlocks head 20 (Nights). * Space Channel 5: Ulala's Cosmic Attack or Sonic Battle - Unlocks head 21 (Ulala). =>Voice Sample: On the main menu, hold D+Y to record a short sound clip. Press D+X to play the clip. This sample is used in the main menu music. =>Hard Mode: Complete the Story mode once to unlock the Hard difficulty mode. ->Hell Mode: Complete Story mode on the hard difficulty to unlock the "Hell" difficulty setting. =>Sound Test: Beat the game once to unlock the sound test on the main menu. ->Special Greetings: On certain days of the year you'll hear a special greeting when on the title screen. Try playing on Christmas, New Year's Day, or your birthday. ->End of Credits: After beating the game, wait for the credits to finish and you'll see one member of the audience left in the room.