I have the Bebob Zoe (no longer in production) controller recommended by BM, and while it can focus the camera via Lanc, it is hit and miss depending on the lens. My best results were with the Panny Leica MFT lenses, with the newer 15mm and 42.5mm (and the new 12-60 Zoom should be in the same ball park) seem to work best. But, that said, there is some lag in the focus, so you need to release the focus rocker before you get to the focus point. With a little practice it works, but not great. BM only recommended the Zoe and the Manfrotto Lanc remotes for the Pocket camera.
Another option, that works with the Micro cameras, but I have not tested this with the Pocket (I sold mine when I got the Micro Camera) is the Ursa Mini grip that has a Lanc Remote on it for start/stop, push to focus and push to set auto iris. This works in the Micro like the push to focus and iris buttons in the Pocket camera, which the Micro cameras lack. You can use the grip on a long Lanc cable, does not need to be mounted to the camera.
If you need a true remote controlled camera, where you can accurately pull focus. Set the iris at the f/stop you want, change frame rates Pm etc, then I would upgrade to a Micro Cinema Camera (good used ones come up for around $700-800 occasionally), which has full SBus Remote capability. You can add a One Little Goat remote and use a IOS/Android Remote application on to control the camera, or just use an ext. SBus cable to have the camera tethered. Send me a PM for details.
For a comparison, see:
viewtopic.php?f=2&t=53515For a list of working Lanc and SBus Controlelrs (the Lanc controllers listed for the Micro will also work with the Pocket):
viewtopic.php?f=2&t=59874&p=351363&hilit=SBus+controller#p351363Cheers