Scanning other PSP game UMDs unlocks corresponding cards. Here is the complete list:
Booster Pack Unlock Unlock 1 Booster Pack. Up, Up, Down, Down, Left, Right, Left, Right, x, o. GameFAQs yu gi oh gx tag force 2 cheats
Yu-Gi-Oh! GX Tag Force 2 remains a cult classic among PSP-era Yu-Gi-Oh! fans. Released in 2007 (JP) and 2008 (NA/EU), it expanded on the beloved Tag Force formula by introducing a massive roster of characters from the GX anime, a deeper partner affinity system, and hundreds of cards from the Phantom Darkness and Force of the Breaker sets. Scanning other PSP game UMDs unlocks corresponding cards