Looks slightly different to the regular 3DS Circle Pad Pro.
Feast your eyes on the first image of the Circle Pad Pro accessory for the 3DS XL (via nintendoeverything).
The add-on makes it possible to use two sticks when playing compatible titles such as Resident Evil: Revelations and Snake Easter 3D.
The new, larger add-on boasts a curvier, seemingly more ergonomic design than the version for 3DS. There's no word on a release date or price.