Unlock 1 Booster Pack:
At the card shop screen, press Up, Up, Down, Down, Left, Right, Left, Right, X, Circle.
Infinite DP:
If you need more DP when you go to the start menu and select start from part 1 (you do not lose any data, your stats will stay the same, as well as your deck) and skip days until you win the lottery, once this has happened take your reward and save the game, exit to the start menu and repeat the process.
(supplied by: fatalisslayer)
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