There is nothing on the rules about emulators. Can I use one to run this game?

Unfortunately no n64 emulator can emulate this game properly and dolphin is quite inaccurate with load times so no emulator is allowed. It's mentioned on our sister site here : http://wiki.pokemonspeedruns.com/index.php?title=Pok%C3%A9mon_Snap

just reminding you that you can get a japanese snap for less than 10 bucks

Thanks for the replys. I actually have pkmn snap, however my N64 isnt working and buying a new one here (Brazil) is expensive :/

As of today, we are allowing emu runs for wii vc. see our post here https://www.speedrun.com/pkmnsnap/thread/hvcdh/1#zlfnf