Suggestions by @saopham

Frank Welker

as GhostZilla in Luigi's Mansion: The Movie (2027)

Martin Short

as Morty in Luigi's Mansion: The Movie (2027)

Mel Brooks

as Dr. Potter in Luigi's Mansion: The Movie (2027)

Kevin Micheal Richardson

as King Macfrights in Luigi's Mansion: The Movie (2027)

Kevin Michael Richardson

as Amadeus Wolfgeist in Luigi's Mansion: The Movie (2027)

Daveed Diggs

as Chef Soulfflé in Luigi's Mansion: The Movie (2027)

Patton Oswalt

as Polterpup in Luigi's Mansion: The Movie (2027)

Alex Hirsch

as Kruller in Luigi's Mansion: The Movie (2027)

Catherine Tate

as Chambrea in Luigi's Mansion: The Movie (2027)

Eric Bauza

as Steward in Luigi's Mansion: The Movie (2027)

Frank Welker

as Trappers in Luigi's Mansion: The Movie (2027)

Frank Welker

as Slinkers in Luigi's Mansion: The Movie (2027)

Frank Welker

as Oozers in Luigi's Mansion: The Movie (2027)

John DiMaggio

as Hammer in Luigi's Mansion: The Movie (2027)

Scott Menville

as Skinner Goob in Luigi's Mansion: The Movie (2027)

Frank Welker

as Goobs in Luigi's Mansion: The Movie (2027)

Catherine Tate

as Hellen Gravely in Luigi's Mansion: The Movie (2027)

Charlie Day

as Gooigi in Luigi's Mansion: The Movie (2027)

Ken Jeong

as Professor E. Gadd in Luigi's Mansion: The Movie (2027)

Keegan-Michael Key

as Toad in Luigi's Mansion: The Movie (2027)