1 King Boo
King ghost is the most obvious choice here. - WendyIsQueen
2 Professor E. Gadd
He lives in a haunted mansion and is asociated with ghosts. - WendyIsQueen
3 Ashley (Wario Ware)
She's a witch so yeah. - WendyIsQueen
Waluigi is a selfish, greedy man who works closely with the infamous Wario. He is Luigi's rival and is known as the opposite of him. Waluigi first appeared in the Gameboy Color game, Mario Tennis as Wario's partner. He has appeared in every Mario Tennis game since, still remaining as Wario's wicked ...read more.
Purple is a main color for Halloween and he also wears black. - WendyIsQueen
Wario is a character in Nintendo's Mario series who was originally designed as an antagonist to Mario. His motives are driven by greed and he will take the side of whoever will give him the most pay. Although he may seem like just a mean man with no heart, he does have a very tragic past.
He's round like pumpkin and wears purple. - WendyIsQueen
Princess Daisy is a fictional character in the Mario series of video games, in which she is the princess of the fictional region of Sarasaland. ...read more.
Because she wears orange and is scary enough to pass as a mummy because desert have mummies. - WendyIsQueen
Kamek is a common enemy in the Mario Bros. Franchise. He usually appears in New Super Mario Bros. Games, Super Mario Bros. Games, or other similar games. He also appears in spinoff titles, like Mario Party, in which he is not a playable character but creates an obstacle for the players on their way ...read more.
He's a wizard only bad thing is he wears blue, if he wore black that would fit better. - WendyIsQueen
8 Dry Bowser
Dry Bowser is the fossilized version of the main antagonist of the Mario Bros. Franchise, Bowser. He first appeared in New Super Mario Bros. on the Nintendo DS after Bowser had been dumped into the lava and was left with his skeleton. Since then, Dry Bowser has appeared as a villain in games like Super ...read more.
Although I like Bowser more Dry Bowser is better fit for Halloween. - Randomator
Undead Bowser is perfect for Halloween theme. - WendyIsQueen
9 Dry Bones
Dry Bones is a common enemy species in the Super Mario series of video games since „Super Mario Bros. 3“ (1988). After his first debut as a playable character in „Mario Superstar Baseball“ (2005), he became a fan-favorite and also got playable in other spin-offs of the Mario series.
Skeleton minion fits spooky theme. - WendyIsQueen
10 Shy Guy
Because he's strange and wears a mask. - WendyIsQueen
12 Boo (Super Mario)
15 Madame Brood (Super Mario Odyssey)