Successfully complete story mode to unlock more playable characters.
Place the game disc in a PC compatible CD-ROM drive to find artwork from the game in the "Sonic Shuffle" folder.
Set the Dreamcast system date to December 24 to replace Lumina with NiGHTS.
Note: All characters may need to be unlocked first.
Successfully complete the game and enter Sonic's room to find the Notebook on the table.
|Play As Big The Cat|
Purchase all pictures of Tails in Sonic's room to unlock Big The Cat in versus mode.
|Play As Chao|
Purchase all pictures of Knuckles in Sonic's room to unlock Chao in versus mode.
|Play As E-102 Gamma|
Purchase the last picture of Amy in Sonic's room to unlock E-102 Gamma in versus mode.
|Play As Super Sonic|
Purchase all pictures of Sonic in Sonic's room to unlock Super Sonic in versus mode.