This is a rather obscure thing for Pokémon Snap, but it has a kiosk called the Pokémon Snap Station. It uses a standard N64 but the printer is exclusive to the kiosk, and plugs into the fourth player slot, like the VRU. It is also compatible with the game Pokémon Stadium (North America only). Maybe if you can get in touch with the right people, maybe you can get the pj64raphnetraw (and the Mupen64 version) to work with the printer? I know this is a longshot, because the kiosks are rare.
General information:
https://www.youtube.com/watch?v=AMbjvGvPkV4
This is a rather obscure thing for Pokémon Snap, but it has a kiosk called the Pokémon Snap Station. It uses a standard N64 but the printer is exclusive to the kiosk, and plugs into the fourth player slot, like the VRU. It is also compatible with the game Pokémon Stadium (North America only). Maybe if you can get in touch with the right people, maybe you can get the pj64raphnetraw (and the Mupen64 version) to work with the printer? I know this is a longshot, because the kiosks are rare.
General information:
https://www.youtube.com/watch?v=AMbjvGvPkV4