Suggestions by @harrybray

Gloria Jailbird

as Belle in A Simpsons Christmas Carol

Lisa Simpson

as The Ghost of Christmas Past in A Simpsons Christmas Carol

Duffman

as Extras in A Simpsons Christmas Carol

Lurleen Lumpkin

as Extras in A Simpsons Christmas Carol

Snake Jailbird

as The Ghost of Christmas Yet to Come in A Simpsons Christmas Carol

Clancy Wiggum

as The Ghost of Christmas Present in A Simpsons Christmas Carol

Herb Powell

as Fezziwig in A Simpsons Christmas Carol

Professor Frink

as Nephew Fred in A Simpsons Christmas Carol

Fred Tatasciore

as Old Joe (Dennis the fish hitman) in A SpongeBob Christmas Carol

Alec Baldwin

as Old Joe (Dennis the fish hitman) in A SpongeBob Christmas Carol

Tom Kenny

as French Narrator in A SpongeBob Christmas Carol

Mr. Lawrence

as Gravedigger (Harold the blue fish) in A SpongeBob Christmas Carol

Sirena Irwin

as Mrs. Cratchit (a random fish) in A SpongeBob Christmas Carol

Dee Bradley Baker

as Tiny Tim (a random fish) in A SpongeBob Christmas Carol

Rodger Bumpass

as Jacob Marley (Squidward) in A SpongeBob Christmas Carol

Mary Jo Catlett

as Belle (Mrs.Puff) in A SpongeBob Christmas Carol

Mr. Lawrence

as Yet to come (Plankton) in A SpongeBob Christmas Carol

Bill Fagerbakke

as Christmas Present (Patrick Star) in A SpongeBob Christmas Carol

Carolyn Lawrence

as Ghost of Christmas Past (Sandy Cheeks) in A SpongeBob Christmas Carol

Clancy Brown

as Mr Krabs (Ebenezer Krabs/Scrooge) in A SpongeBob Christmas Carol