User blog comment:Otakon7/Otakon7's Buddyfight Simulator/@comment-2234004-20140706210125/@comment-2234004-20140707140343

Those cards got their flavor since the flavor was present when the cards were being added to the form, cards that didn't have a flavor text at the time were skipped; since it doesn't impact the game, finding and adding the flavor text to vanilla cards is too much work.