Fatal Fury 3 Codes -

Fight as Ryuju Yamazaki and the Jins:
Complete and save the game. Exit, then restart the game. Select the "Load Save Data" option, followed by the "New Game" option. Highlight the following characters in order at the character selection screen and press Low Kick once on each fighter: Terry, Hon Fu, Mai, Geese, Bob, Sokaku Mochizuki, Andy, France, Joe Higashi, and Blue Mary. A message will appear to confirm correct code entry.

Small fighters:
Select Vs mode, then hold the Low Kick and High Punch buttons for both players while choosing fighters on the character selection screen.

Hidden song:
Insert the disc in a standard audio CD player and advance to track 41.