After the release of Super Smash Bros. for 3DS in Japan (and its demo for the rest of the world), a lot of players started to share their Control Pad, showing how it was damaged after playing the game. Meanwhile most of the cases are on the original launch systems, some 3DS XLs are also affected by this issue.
You can view a gallery of the 3DS and 3DS XL models with the Control Pad damaged:
