Metal Gear Acid cheats and cheat codes for Sony PSP

Cards -Passwords:
Get Viper card from the MGS on the Game Boy Color: Enter VIPER
Get Jehuty card from Zone Of The Enders: Enter JEHUTY
Get Karen card from Policenauts: Enter KAREN
Get Mika card from Snatcher: Enter MIKA
Get Saitou Yuu card: Enter YEBISU or ELYTS in japanese game version
Get Asaki Yoshida card: Enter UMEDA or NOMEL in japanese game version
Get Shibuya Eri card: Enter ROPPONGI or MAEB in japanese game version
Kosaka Yuka card: Enter KOBE or SABRAGE in japanese game version
Get XM8 card: enter XMEIGHT
Get Solid Snake (MG) card: Finish the game once.
Get Raiden card: Finish the game twice.
Unlock Teliko: Finish the Residential Zone mission. 


Link battle option in Optins menu:
Finish Stage 06

Getting rare cards:
1. Save your game.
2. Go to card shop
3. Buy all packs for the rare card (what you want)
4. If you can't see any cards you want, step back to option, then return 
to the title screen. 
6. Load back your savegame and do it again the above until you get 
the desired card.