Phantasy Star Online - Platform: Dreamcast

Secret Costumes:
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When you creat a new character, you can get access 
to new costume colors by selecting a character, then 
typing in the corresponding code in the Character Name 
selection. If you type in the code successfully, you'll 
hear a sound. The two new costumes are now available, 
and you can change the name of the character to anything 
you want.

Character		 Code 
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RAcast 	MEIAUGHSYN 
RAcaseal 	NUDNAFJOOH 
RAmar 	SOUDEGMKSG 
HUnewearl 	MOUEOSRHUN 
HUcast 	RUUHANGBRT 
HUmar 	KSKAUDONSU 
FOmarl 	DNEAOHUHEK 
FOnewm 	ASUEBHEBUI 
FOnewearl 	XSYGSSHEOH 

Lobby Animations:
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First, you must have a keyboard. While in the lobby of 
the online mode, hold ALT and press buttons F1-F12. 
Each time you will get a different animation.