While everything from Godzilla to Bodacious Space Pirates is being adapted into a social digital card game in Japan these days, predictably, Mobage's Puella Magi Madoka Magica game has enjoyed some longevity. During that time, the game has had some fun introducing new characters and redesigning the core favorites. The latest has been a set of bridal variants.
previous notables have included Hinamatsuri (Doll Festival)
Hanagasumi (Cherry blossom viewing)
The Hollow Little Mermaid (original characters)
and speaking of mobile Madoka Magica, DoCoMo has teamed up to offer a Charlotte Bearbrick