Uhhh, I suppose an original base set, shadowless Charizard.
If you're talking rare, it MIGHT be my original base set, shadowless common Diglet. For some reason one of it's earth energy icons is flipped side-ways. If it's a miss-print it could be worth alot of money now. I know for sure it's real and not a fake card because 1) I can tell a fake card from a real card and 2) I got it from a legit booster pack.