i think you are onto something here for sure. i do like one of the suggestions in that beating the character then you get the card with the main info and after that you would add in drops and other things afterwards.

you could have the basic stats in game until you acquire the card then after you can add in the items like what it drops/incaps and other mob extras after you find it out. would really be nice if they added something like triple triad and as you filled out more info on each mob the card became stronger. i could see people like me going to each and every mob to get the card then continue fighting it until i got every blank filled out on the card because i am an exploration and side quest fanatic.

if anyone asks me about x for example i can recall hours of blitzball just to be able to get every character to stack my team there also.