I have pulled a disproportionately high about of Ho-oh myself. And, as far as trends go (because I track weird stuff), I've had very, very little luck with Giratina pack art and very good luck with Gyarados pack art. Not making any implications, just saying....
The weirdest that that happened to me was a Swablu didn't settle right and got crimped in the pack sealer. When I opened it, I notice there was a card kind of hanging out and the pack was sealed, but didn't think much of it. When I was done opening all of my packs, I set my rares and what not aside, then picked up my bulk items, banged them against the table to settle them evenly and noticed a card was ruffled pretty bad.