Near the end of the film, Bugs' office has a sign that says "-Member- Detective Guild, Local 839". Local 839 of the IATSE was the Animation Guild, whose members made the cartoon.
Third appearance of Rocky, first appearance of his accomplice Mugsy.
Alex Lifeson's (Rush) side project "Victor" (1996) contains a track called "Shut Up Shuttin' Up". This references a line from the cartoon.
Both the gas station and the make of Rocky's car are Acme.