First the was a pocket station emulator. I think it's still around somewhere.
Second, none of the PS1 emulators supported the pocketstation system.
Real shame since it's just an ARM thumb (ARM7T) processor with an SPI port and a 128K flash rom to store the pocket station games in.
The resolution was 32x32 pixels (wow?) and the uC was made by ATMEL.
As for an emuator... hmmm I was considering doing such a beast at one time. The problem is how the playstation recognizes the pocket station being pluged in.
Cyb