Like I said there are typically multiple G powers per specific bakugan. However it's not really random, you just have to know which packs to buy. Bakugan has become a lot more standardized since the B2s, and it's very easy to get what your looking for, because they are always packed the same (where as in series one, a friend and I bought the same exact starter and received different G's on our preyas.. it was technically random back then.). It's just a matter of getting that specific booster or starter before they stop making it and switching things up.And by specific...I'm surprised you guys have never noticed the Numbering system on the UPC. On any Bakugan Barcode you'll notice two sets of numbers on the bottom. The one to the left is the item number, the one on the right is an assortment number of sorts ( it's identical to the number on the barcode) or some of the newer ones just feature the barcode number and then the item number underneath. The items numbers ( located to the left or centred bottom) are unique for the styles so that's what we want. For example I have a Haos Naga that reads "200117979" on the item number. I can tell you If anyone is looking for the Haos Naga with 640Gs... that is the booster you will want to pick up, the one with that exact number. (this is more helpful for booster packs of course, because starter you have other bakugan to identify the pack by. I used to write down the booster pack #s in order to help me and my friend identify sealed boosters, but I lost my list, and then it became tedious.
Wow, I'd like to get my hands on that list!