During Microsoft's E3 media briefing, the company announced a slimmer version of Xbox One called...
First Look At The Circle Pad Pro For 3DS XL
The accessory (add-on) makes possible the use of dual analog controls on the 3DS. This comes in handy if you’re playing titles like Resident Evil: Revelations.
In itself it boasts a very curvy design which is a bit different from the original Circle Pad Pro design.
Currently there has been no word on a release date or a price but you can expect them to pop up on the web soon.