So first of all, even though I picked the name “Bakudad” as my nickname, I suppose I should clarify that I'm not connected in any way to “BakuganMom” =)Although ironically, our stories sound very similar. I got interested in Bakugan when I started looking for some Bakugan for my kids before Christmas, and since it was hard to figure out which was which and which ones my kids would like, I did a lot of the same things -- I looked around online (that's how I found this site), I regularly searched my local stores, etc.Pretty soon I wanted to know everything I could about Bakugan. Like you I've compiled a spreadsheet of the different Bakugan I've found, the different package and series types, etc. -- since I have gotten some duplicates accidentally. Although admittedly I rarely actually take my kids to the stores, since they get pretty fussy about wanting a new toy when we're looking at toys at a store. Instead I buy them and store them in a closet, and when my kids have earned money they can buy them from me instead of the store.Like Nimrod98, I also live in northern California. I live in the SF Bay Area, in the Dublin/Pleasanton/Livermore "Tri-Valley" area. Just out of curiosity, do you mind sharing the location of the Wal-Mart where you found so many packs of Bakugan?