Entering the following numbers in the Sound Test to access these messages (You will need Sound test Unlocked in Extras): (Codes work with both Japanese and American sound tracks)

Effect	Code
"Batman" Sonic	PCM 04 DA 21
Cute Sonic	PCM 11 DA 09
Dj Mc Sonic	PCM 03 DA 01
Secret Special Stage	PCM 7 DA 7
Tails - See you Next Game	PCM 12 DA 11
That Freaky Sonic One	PCM 12 DA 25