Luigi’s Mansion For 3DS Will Support Download Play
Do not own a copy of Luigi’s Mansion for the Nintendo 3DS, worry not, you can still join in for a little boss fight as Luigi’s Mansion will support download play on the Nintendo 3DS family of systems.
Of course, if both of you own a copy Luigi’s Mansion for 3DS, more multiplayer features will be available for both of you to try out so it will still be best if both of you owned a copy of the game.