My +Control Pad isn’t working properly...
Do you have the same problem with several games?
If so, it appears that your Nintendo 3DS may be faulty and need to be repaired. You can book it in for inspection by the Nintendo Customer Support Team.
If not, please try the Game Card in another Nintendo 3DS system, if possible.
Does the same problem occur in another Nintendo 3DS?
If you’ve tried the game in a different Nintendo 3DS system and the +Control Pad doesn’t work properly either, the Game Card may be faulty. If the +Control Pad works as it should with the Game Card in another system, it’s likely that your Nintendo 3DS is faulty, and will need to be repaired.