#CotD: The orange, sneaker-wearing monster first appeared in “Hair-Raising Hare” but he was not yet called Gossamer.
Hair-Raising Hare (1946) — Merrie Melodies Cartoon Series
A mad scientist needs specimens for his experiments. Lured to the scientist’s lair in a castle by a sexy mechanical rabbit, Bugs is hunted down through the dungeon by the big orange monster (so scary that it frightens its own mirror image away) who wants the bunny for dinner.
You can watch “Hair-Raising Hare” on video at Big Cartoon DataBase