Suggestions by @dmcmusiclover

Phantamanta

as Black Manta in Super Mario DC

Fozzie Bear

as Banjo in Disney Smash Bros

Diddy Kong

as Dee Jay in Super Mario Street Fighter

Shriek (CatDog)

as Isabelle in Nickelodeon Smash Bros

Eduardo

as Bowser in Cartoon Network Smash Bros

Mr. Gus

as King K. Rool in Cartoon Network Smash Bros

Finn the Human

as Link in Cartoon Network Smash Bros

Mung Daal

as Luigi in Cartoon Network Smash Bros

The Mayor of Townsville

as Mario in Cartoon Network Smash Bros

K.O. (OK K.O.! Let's Be Heroes)

as Ryu in Cartoon Network Smash Bros

Samurai Jack

as Marth in Cartoon Network Smash Bros

Donkey Kong (The Super Mario Bros Movie)

as Hulk in The Toonvengers (CN/Disney XD/Nick/Netflix/etc MCU Phase 1)

Detective Pikachu

as Thor in The Toonvengers (CN/Disney XD/Nick/Netflix/etc MCU Phase 1)

Eva Green

as Lady Bow in Super Mario Bros Movie Series

Mac (Foster's Home for Imaginary Friends)

as Little Mac in Cartoon Network Smash Bros

Mordecai (Regular Show)

as Falco Lombardi in Cartoon Network Smash Bros

Rigby (Regular Show)

as Fox McCloud in Cartoon Network Smash Bros

Le Quack

as Duck Hunt Duck in Cartoon Network Smash Bros

Courage

as Duck Hunt Dog in Cartoon Network Smash Bros

Skips

as Donkey Kong in Cartoon Network Smash Bros