Board Thread:Questions and Answers/@comment-112.196.179.182-20170529090042/@comment-33113496-20190123025040

if you get an xp fighter card (dupe) .. it looks like this ...

if you train a fighter and you own one or serveral xp cards, you'll push the button top right of the fighter after then they will pop up! no matter for which fighter. if you have a matching xp card it will blink up as like the matching abilities in the picture ....