Marcus-zzz seemingly out of nowhere just gave is a Commodore 64 core for the Analogue Pocket, which you can grab here:
https://github.com/markus-zzz/myc64-pocket
Most of the updaters should already have it. Pocket Sync will also offer to install the 3 files you need to download to get it working.
(kernal.bin, basic.bin, and characters.bin, respectively)