Topic: Nine Parchments multi Switch multiplayer?

I was wondering if both me and a mate had it if we could hook up and both play handheld multiplayer on our own systems together or do you you have to screenshare?

Short answer, you can use different systems.
Nine Parchments supports Online and/or Local (read: one Switch) multiplayer. In order for you to play together (each of you on your own Switch with your own copies of the game), you would be using Online play.