Suggestions by @dmcmusiclover

Terrence (Foster's Home for Imaginary Friends)

as Cartoon Network in Villains

Verminious Snaptrap

as Nickelodeon in Villains

Chandler McCann

as Nickelodeon in Villains

Fossa (Madagascar)

as Dreamworks in Villains

Gladys Sharp

as Dreamworks in Villains

Professor Rupert Marmalade

as Dreamworks in Villains

Professor Pee-Pee Diarrheastein Poopypants Esq./Tippy Tinkletrousers

as Dreamworks in Villains

Makunga

as Dreamworks in Villains

Chef Skinner

as Pixar in Villains

Sir Miles Axlerod

as Pixar in Villains

Mr. X (Streets of Rage)

as SEGA in Villains

Captain Syrup

as Nintendo in Villains

Tatanga

as Nintendo in Villains

Andrew Oikonny

as Nintendo in Villains

Leon Powalski

as Nintendo in Villains

Pigma Dengar

as Nintendo in Villains

Ludwig von Koopa

as Nintendo in Villains

Lemmy Koopa

as Nintendo in Villains

Roy Koopa

as Nintendo in Villains

Iggy Koopa

as Nintendo in Villains