??? (Account Loss)

??? is a shady character who appears as the antagonist of Account Loss. He steals SMG4's YouTube password and uses it to hack SM64 and torture Mario. Eventually Mario and SMG4 defeat him, allowing SMG4 to regain control of his YouTube account and change his password.

???'s palette is completely black, although his eyes, sideburns, and other sprites remain visible. It is possible he could be Smg3.