I've gotten this error a few times playing Pokemon X:
"An error has occured, Hold down the POWER Button to turn off the power, then turn it on and try again. For help, visit support.nintendo.com"
Usually this happens while the system is in sleep mode; I close it and come back to it later and it's displaying this message. This latest time, it happened while I had the game open and was playing it; the screen suddenly went black and the error message displayed.
After I hit the power button, I went back to the home menu and my cartridge icon was blank as if I didn't have a cartridge in there. Once I ejected it and put it back in, it showed up again.
I mostly do digital downloads, not cartridges, so I don't know if it's an issue with the card reader or the cartridge itself. I haven't had the problem with the two other carts I've used but it's kind of a rare problem and I don't play those nearly as much as Pokemon.
So, what's going on here? What should I do?