Power Stone cheats and cheat codes for Dreamcast

Unlock Extra Options :
Finish arcade mode with any character on any difficulty level.

Win arcade mode on any difficulty level with the indicated number of
different characters, to unlock bonuses:

Ayame's mini-game: Complete arcade mode with 6 characters
Extending staff: Complete arcade mode with 1 character
Falcon's mini-game: Complete arcade mode with 5 characters
Gattling gun: Complete arcade mode with 2 characters
Gunrock's mini-game: Complete arcade mode with 7 characters
Ray gun: Complete arcade mode with 3 characters
Shield: Complete arcade mode with 4 characters 
Kraken as playable character: Complete arcade mode with all 8 characters
Valgas as playable character: Complete arcade mode with Kraken

Unlock Mutant Fusion Valgas:
Complete arcade mode with Kraken to unlock Valgas, then finish 
arcade mode with Valgas on difficulty level 8. Enter page tewelve 
of the Power Stone Collection to unlock Mutant Fusion Valgas.
You can select Final Valgas only in VS mode, by only one
player per match. 

Change outfits:
At the character selection screen, press B.

View ending sequences
Complete arcade mode with any character on any difficulty level,
You can see the endings at page 14 in the Power Stone Collection.

Unlock Sound test on page 25 in the Power Stone Collection:
Collect at least 2000 coins in the VMS mini-games

Unlock Art collection on page 13 in the Power Stone Collection:
Collect at least 1000 coins in the VMS mini-games

Unlock Virtual battle mode on page 5 in the Power Stone Collection:
Complete arcade mode with all 8 characters to unlock Kraken, then 
finish arcade mode with Kraken on any difficulty level.

Unlock Dual Virtual battle mode on page 6 in the Power Stone Collection:
Complete arcade mode with Kraken to unlock Valgas, then finish arcade 
mode with Valgas on any difficulty level.