If you aren’t planning on upgrading to the New Nintendo 3DS, than you can still use the Circle Pad Pro. The second circle pad acts identically to the new c-stick that is included on the upgraded model. In Majora’s Mask 3D, this will allow you to control the camera angle and it gives you 360 degrees of camera freedom.
Reminder: If you're not upgrading to a New 3DS XL you can use a Circle Pad Pro for the new camera in Majora's Mask. pic.twitter.com/1SHMHOimqs
— Jose Otero (@jose_otero) January 15, 2015