Yu-Gi-Oh! Double Pack 2 Cheats (GBA)

Unlockable Destiny Board Traveler Characters: At the 'Title' screen for Destiny Board
Traveler enter the following codes to unlock the corresponding characters.

Unlock Kaiba: Down, B, Left, Right, Right, R, Up and R, A 

Unlock Yami Bakura: L, Down, Right, Left and B, R, Down, Down, A 

Unlock Yami Yugi: R, Left, B, Right, Up and R, Right, Down, A 

Unlock Grandpa: Press L, Right + B, Right, B, R, Left, Down, A 

Unlockable Destiny Board Traveler Worlds: At the 'Title' screen for Destiny Board Traveler
enter the following codes to unlock the corresponding Worlds.

Unlock Domino Pier: Win one battle as Joey 

Unlock Kaiba Land: Win one battle as Mokuba 

Unlock Above Tibet: Win a single round as Grandpa