Unlocking by defeating 50 times of certain characters in the game, then partner with them and go to Martha's place. Speak her and choose the second option, the day will end and find your partner there should have changed his/her costume also his/her hearts will reset and uses different deck type.
Give Dark Magician Girl, Ebon Magician Curran, White Magician Pikeru, Card Ejector and Cyber Tutu figurines to the Shop Owner to gain 10% Discount per figurine. Once all 5 are given the Pack Picking Flowers is unlocked
Enter this code in the card shop.
The following characters can be unlocked by completing other characters' stories.
You get specific Cards from finishing people's story lines