Complex sentence: Gyro Gearloose is a fictional character, an anthropomorphic goose created by Carl Barks for the Walt Disney company who originally appeared in the comic books as a friend of Donald Duck, Scrooge McDuck and anyone who is associated with them.
Split into simpler sentences: Gyro Gearloose is a fictional character, an anthropomorphic fowl created by Carl Barks for The Walt Disney Company. He is part of the Scrooge McDuck universe, appearing in comic book stories as a friend of Donald Duck, Scrooge and anyone who is associated with them.