Suggestions by @jesselee

Swiper the Fox

as Swiper The Fox in Scrappy-Doo: The Movie

Frankenstein's Monster

as Frankenstein in Scrappy-Doo: The Movie

The Grinch (Character)

as Grinch in Scrappy-Doo: The Movie

Nosferatu

as Nosferatu in Scrappy-Doo: The Movie

DoodleBob

as DoodleBob in Scrappy-Doo: The Movie

SpongeBob SquarePants (character)

as SpongeBob SquarePants in Scrappy-Doo: The Movie

Patrick Star

as Patrick Star in Scrappy-Doo: The Movie

Si and Am

as Si and Am in Scrappy-Doo: The Movie

Doctor Victor von Doom

as Doctor Doom in Scrappy-Doo: The Movie

Maleficent

as Maleficent in Scrappy-Doo: The Movie

Chernabog

as Chernabog in Scrappy-Doo: The Movie

Pete (Disney)

as Peg -Leg Pete in Scrappy-Doo: The Movie

Drizella Tremaine

as Drizella Tremaine in Scrappy-Doo: The Movie

Green Goblin (Norman Osborn)

as Green Goblin ( Norman Osborn ) in Scrappy-Doo: The Movie

Anastasia Tremaine

as Anastasia Tremaine in Scrappy-Doo: The Movie

Liam Neeson

as N in Scrappy-Doo: The Movie

King Koopa

as King Koopa in Scrappy-Doo: The Movie

Ice King

as Ice King in Scrappy-Doo: The Movie

Fates

as Fates in Scrappy-Doo: The Movie

Pain

as Pain in Scrappy-Doo: The Movie