User blog comment:Otakon7/Otakon7's Buddyfight Simulator/@comment-25600444-20160321220944/@comment-2234004-20160322101523

I get cards via the wikia API, but the API cannot tell the difference between a character page and a card page (they're all pages), but the card pages have one attribute that other pages do not: thumbnail (combined with some parameters that sets it apart from galleries), but the wikia only generates thumbnails for big enough images.

And yes, changing the image changes the thumbail thus changing what's in the sim.

Wikia generates the thumbnail within 24 hours, but the sim itself updates itself once a week, every monday.