Who are the triplet nephews of Donald Duck?
Trick or Treat (1952 film):  The cartoon, which takes place on Halloween night, follows a series of pranks between Donald Duck and his nephews with Witch Hazel. Huey, Dewey, and Louie: Huey, Dewey, and Louie Duck are triplet cartoon characters created in 1937 by writer Ted Osborne and cartoonist Al Taliaferro, and are owned by The Walt Disney Company.
Huey, Dewey, and Louie