Suggestions by @diablogamer

Jiren

as Jiren in Shaggy vs Goku: The Ultimate Battle

Whis

as Whis in Shaggy vs Goku: The Ultimate Battle

Beerus

as Lord Beerus in Shaggy vs Goku: The Ultimate Battle

Charles Martinet

as Mario in Shaggy vs Goku: The Ultimate Battle

Frank Welker

as Scooby-Doo in Shaggy vs Goku: The Ultimate Battle

Son Goku

as Son Goku in Shaggy vs Goku: The Ultimate Battle

Matthew Lillard

as Shaggy in Shaggy vs Goku: The Ultimate Battle

Matthew Lillard

as Shaggy in The Spongebob (or The Yellow Knight)

Clancy Brown

as Commissioner Krabs in The Spongebob (or The Yellow Knight)

Rodger Bumpass

as Squidward in The Spongebob (or The Yellow Knight)

Junior Asparagus

as Junior Asparagus in The Yellow Knight Rises

Bill Fagerbakke

as Patrick The Butler in The Yellow Knight Rises

Hiroyuki Sanada

as Scorpion in Shaggy: Mortal Kombat

Phil Vischer

as Monster Bob in Shaggy: Mortal Kombat

J.K. Simmons

as J. Jonah Jameson in Bully Maguire: A Pizza Time Story

Morgan Freeman

as The Hog Riders (Post-Credit Scene) in Shaggy: Revenge of the Asparagus

Hoon Lee

as Master Splinter in Shaggy: Revenge of the Asparagus

June Foray

as Rocket J. Squirrel in Shaggy: Revenge of the Asparagus

Tara Strong

as Rocket J. Squirrel in Shaggy: Revenge of the Asparagus

Bullwinkle J. Moose

as Bullwinkle J. Moose in Shaggy: Revenge of the Asparagus