i was looking through some of my older cards, and found a Mr. Mime from Aquapolis, and saw it said '95b/147'. i then looked on the serebii database and the picture says '95a/147'. is there any reason for this? also, my card is an e-reader card.
From what I remember (I might be wrong) it has to do with the e-reader barcode on it. IIRC you needed to scan both Mr. Mime cards to play a certain minigame.