Tex Avery’s influence wasn’t far away in Mike Lah’s Oscar-nominated One Droopy Knight (1957). It owes a lot to Señor Droopy (1949), and the climax gag is partly lifted from Homesteader Droopy (1954) and partly from other Avery cartoons where a character cracks up into pieces.
A dragon draws a moustache on a picture of Droopy’s beloved princess. “That makes me mad,” exclaims our hero, who proceeds to beat up the dragon. Finally, he snaps off the dragon’s tail (it is hollow) and bashes him with it. These frames tell the story.
For ripping off Avery, Homer Brightman gets a story credit. The animators credited are Irv Spence, Bill Schipek, Herman Cohen and Ken Southworth, with Ed Benedict designing a great-looking dragon.