We know it's the multiplayer mode because you can also see what appears to be Luigi in these videos too, making it the only gameplay footage we have of Luigi in the original Super Mario 64.

It can be assumed that Luigi would have been playable, as Shigeru Miyamoto had planned to make Super Mario 64 2 multiplayer – in fact, the first playable demo level was multiplayer. The Switch ...

As the title suggests, in Mario & Luigi: Brothership you control two characters – Mario and Luigi. The presence of two protagonists could suggest that some sort of multiplayer or local co-op will be ...