I passed on the Ice and Fire Mario and Luigi a ton of times, I finally got them because they were the last ones I needed to complete series 1 and 2, I guess I'm a completionist now. 
I snagged a set of the Walmart ones, I had to check every register for Tetra, the rest were plentiful, luckily not all registers were in use. I also snagged a box fro myself.
Nice, larry! Congrats on being a completionist for the first two series!
I have awesome news myself! I walked into my local Toys R Us tonight, expecting to once again look at the world's saddest World of Nintendo display (always two or three plushes, and a lone Micro-Land playset sitting on a shelf on the end of the aisle). However, after not seeing it in its normal spot, I search the aisles to find a MASSIVE stock of World of Nintendo merchandise! All Series 1-1 figures (seems like they're showing up awfully late my neck of the Canadian wood), as well as 4" Marios and Yoshis, wall-crawling Mario Kart 8 remote control cars, both deluxe Micro-Land playsets, and FOUR 6" Donkey Kong Figures!
I was thrilled to see all this. I like to think it's a good sign of things to come. Sad thing is that I ordered a 6" DK from Amazon.com last week, but it'll end up working out to about the same price, given TRU $19.99 price tag. If they had had a 6" Bowser, which I won on eBay for $27 USD, I would have really been pissed! But either way, I'm very happy to say that 2.5" Wario and Waluigi are mine!