aqui tienes una guía en inglés y aqui trucos:
Here is the list of all the currently known codes, from various sources. I
also take no credit for finding these.
To use these codes, you need to hold L1+L2+R1+R2 for 5 seconds at either the
main menu or bonus materials menu. Once held long enough, a hidden menu will
appear titled Magic Codes. Various cheat options are here with a series of
A's beside them. The value of these letters can be toggled by highlighting
one of these and holding down X and using the D-Pad left or right to
switch characters (A through Z).
NTSC-U/C "United States" Version - SCUS-97142
From GameFAQ's and GameWinners
Invulnerability: MONSTROUS
Solum: Unknown
Aquis: Unknown
Aetha: Unknown (8 letters)
Volca: Unknown (9 letters)
Gallery: Unknown (9 letters)
Easykill: Unknown (10 letters)
Bonus A: Unknown (9 letters)
Bonus B: PRIMAL
Bonus C: DEMONREALMS
Bonus D: Unknown (8 letters)
Bonus E: OBLIVION
PAL "European" Version (Regular and Collectors) - SCES-51135
From PrimalGame.com's VIP Area
Invulnerability: DEMONISE
Solum: SNOWFLIGHT
Aquis: CHARYBDIS
Aetha: FLINTLOCK
Volca: SUNSTONE
Gallery: ARCANUM
Easykill: MORTIFIC
Bonus A: SEABREEZE
Bonus B: AURORA
Bonus C: PSYCHOSIS
Bonus D: MIRRORY
Bonus E: ASCENDENT
saludos
pd: sorry si no te he podido ayudar, pero no tengo el juego.