Suggestions by @dmcmusiclover

Cackletta

as Proxima Midnight in Marvelio

Dimentio

as The Joker in Super Mario DC

Prince Bowser Koopa Jr.

as The Joker in Super Mario DC

Mollusque-Lanceur

as Dr. Octopus in Marvelio

Shadow Mario

as Kage in Super Mario Street Fighter

Dr. Crygor

as Cyclops in Marvelio

Professor E. Gadd

as Professor X in Marvelio

King K Rool

as The Lizard in Marvelio

Wario

as Thor in Marvelio

Princess Peach Toadstool

as Black Widow in Marvelio

Ashley

as Raven in Super Mario DC

Dr. Crygor

as Cyborg in Super Mario DC

Wario

as Bizarro in Super Mario DC

Waluigi

as The Riddler in Super Mario DC

Wario

as The Penguin in Super Mario DC

Penguin (Wario Land)

as The Penguin in Super Mario DC

King Boo

as Gentleman Ghost in Super Mario DC

Guppy

as Orca in Super Mario DC

Eyerok

as King Tut in Super Mario DC

King K Rool

as Killer Croc in Super Mario DC