It is possible to play up to 4 players on the SNES emulator on Recalbox.
If you want to enjoy multiplayer on SNES, you will need one controller per player, properly configured.
Hotkey + B
.Back
twice and go to Settings
> Configuration
.Save configuration on exit
setting.Return
twice and go to Main Menu
> Quick Menu
> Controls
> Port 2 Controls
.Device Type
option, scroll down until you have the text Multitap
displayed.Go back once and go to Manage Remap Files
. Here, select for which case you would like to save the multitap option (for the game, for the content directory, etc.).
Go back twice and select Restart
.
And that's it. The game works, and you are the king of the party!