The Wubbulous World of Dr. Seuss (1996)

S1E12 The Blag-Bludder Beast

In Troomph, fear rules the land — and nothing terrifies the locals more than the legendary Blag-Bludder Beast, a monster everyone talks about but no one has ever actually seen. So when Yertle accidentally "defeats" the mythical creature without even realizing it, the Troomphians suddenly fall under his tiny webbed thumb.