My condolences, TC. I feel ya, man. It happens to the best of us. I called myself buying one of those things, and had a cluster **** of pixels dead or stuck. I easily returned it, and never looked back.
As far as stuck or dead pixels go, it's a lucky dip no matter what hand held you buy unfortunately. It's best to deal with idiot Nintendo or the responsible game company in general as far as this goes. Doing it through stores (especially Gamestop) will only have them profiling you like you're trying to scam them or something for this problem.
What's even more pathetic and sad is the sheer amount of arse hurt Nintendrones actually defending a manufacturer's defect. The ballad of the Nintendo boy scout and fanboyism is even stronger in this one. Reggie's still not impressed, guys.
If it's a stuck pixel, there are a few ways to unstick it by yourself.
Cycle through some solid colours repeatedly, try press lightly on the pixel, or run a pixel unstuck video on the 3DS. (seizure warning)
I actually tried this method with a GBA SP. The thing is, that pixel came BACK. It's really best to address the problem by eradicating it rather than treating it.
So....New Super Mario Bros. 2 wasn't released as FREE DLC for New Super Mario Bros.?!
mine had no dead pixels (that I noticed anyways) mine has a loose hinge (rocks slightly back and forth just by me tilting a little bit) and the back battery compartment squeaks.. other than that I like it better than the smaller 3DS, except for getting play coins as the handheld is heavier and harder to shake, and requires you to wear clothes with loose pockets so it can actually count your steps. jeans +3dsXL= FAIL