Both died in a time period before the present events of both series (Alice was murdered at least 100 years before the events of (Mario) The Music Box, while Sarah was killed in 1969), and both of them wanted revenge against those who wronged them in the past (Alice with Marchionne, Sarah with Luther, Martin, and Michael).

Malice's/Alice Aduraice's appearance would serve as a good parallel to Needlemouse Sonic/Sarah Henderson.

Mario from (Mario) The Music Box, or more specifically, Malice, with Boyfriend rapping to free Mario from Alice's influence.

Bonus points if it ties into Beta Luigi with it being explained that the boos taking Mario away allowed them to possess him.

Power Star Mario, with him being possessed by the boos.

Jossed, though he was apparently a scrapped character, so it’s also kind of confirmed.

His song will, as SMG4 loves referencing memes, have plenty of references while still being rather tough.

SMG4!Mario, though not creepy, could fill a similar role to Racist Mario.

His song could reference his theme 'Host Hoedown'.

DJ Hallyboo, though not a variation of Mario, Luigi, or Wario, still comes from a rather famous creepy Mario fan work, and 'Apparition''s Game Over screen has an Anti-Piracy screen.Their song will likely reference songs from Dolor, mainly 'It's A Me' (not to be confused with the song of the same name from this mod). The shadowy Mario or bloody Luigi monsters from Super Mario Dolor, though the fact that the game got Screwed by the Lawyers could throw a wrench in that.Marco confirmed that in his GB form, he can travel between Mario games, which is apparently gonna play out in a future update.

exe himself, and he can't guarantee that Boyfriend will survive them all. The catch is that they are all corrupted by various horrors like. With it, he's able to travel to Super Mario World, Luigi's Mansion, Super Mario 64, a different Super Mario Bros. 3 and gave Boyfriend his power of game travel. Tying into the previous theory that he gave Boyfriend the Magic Flute, he presumably got it from Super Mario Bros. to Super Mario Land 2: 6 Golden Coins, and transform into GB during that process. exe has the power to travel between different Mario games.As evidenced by the transition between 'Its A Me' and 'Golden Land', he's shown to be able to transport Boyfriend from Super Mario Bros.

Mario the music box exe