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To keep an egg of your rngs, just clone the egg ... Then you can check the ivs of the one you hatch. That way, you can keep it and have the egg if the ivs are good.. Or simply turn off your game if they aren't right.
Haha its cool dood! We can do the trade tomorrow xD. Sorry you lost your battle lol. I thought you had already known that Heracross was BL. I'm going to miss Heracross. I'm not really for using BLs xD. I havent even used him in UU =/.