Luigi's mansion

How can luigi’s mansion be played in co-operative? (Obviously in citra)

In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.

I want to play luigi’s coperative mansion, but the multiplayer is different than for example pokemon, it is local, so I don’t know if there is any citra or some way to play local in citra

dude, the online on citra emulates the local play, because they can’t connect to official nintendo servers.