>>51636870...Huh. After going through all the tests, I think this might actually be real. When I first looked it up, I found completely different information saying that ALL DS cartridges should start with the NTR code, but it seems like all gen 5 carts have the TWL code. Also, apparently my phone flashlight isn't optimal for checking infrared transparency, because it definitely looked grey when I used it to check the first time. After using a crappy flashlight from 2008 in my drawer it now looks more of a reddish-purple like the page suggested.
Well, guess I might actually end up playing White 2 after all. I wonder if I'll be able to transfer my party members to the Bank by the time I do play it...