Unfortunately, we didn't have an eighth player yet to join so Orange Luigi went without a partner. For the first attempt it took us awhile to remember that Gooigi players are able to spawn themselves. People were pretty unfamiliar with the controls so it might look a bit painful lol - but we did fairly decent on our last attempt until one of the infamous "Collect Money" floors did us in.
This is done using 4 Switches on which 2 players can each play, output to a single screen using a Bre4k multiviewer.