Password Machine
Win the Expert cup. The Password Machine can now be accessed in the Duel Shop by tapping the slot machine on the left. Enter one of the following passwords at the Password Machine to active the corresponding fuction:
Result - Password
Credits - 00000375
Sound test - 57300000
Note: Once you unlock all the booster packs and get them at 80% you will get a letter on your computer saying the code "57300000". You must have at least 1000 KCP to use the password machine. Doing so will give you access to the game's music tracks. The 1,000 points that you paid will be returned to you.