The rarity is all the same, but I've seen every one. I think the hardest is Garchomp b/c I've seen 3 Glace, 4 Leafy, ? Z, and 2 Chomp. So many people have had Z, so I didnt even bother to count. I have a Chomp and a Glace.
On a prerelease tournament for Majestic Dawn two players got Leafeon LV.X.
I know about many getting Porygon-Z LV.X in their boxes.
Some of my friends also got Garchomp LV.X.
But I have never heard of someone getting Glaceon LV.X in their box. Except og the prerelase tournament, where one player got Glaceon LV.X.
Had money lying around and after seeing clips of Dialga vs Palkia I felt the urge to splurge!!
1.5 Boxes of MD and pulled Garchomp and Porygon. What I didnt know is that I have to buy MT to get the regualr Garchomp and Honchkrow, otherwise my lvl x's are useless.
I've never pulled a Porygon-Z from a pack. (I opened 3 boxes of MD)
It seems, from my experience in opening packs and by talking to other people that open packs, and even just looking at other people's collections. That certain cards are more common in certain parts of the country.
Like my friend in California who pulled 3 Porygon-Z's from 2 boxes.
I think there are a few different places where Pokemon cards are made, and perhaps this affects the per box ratio.