Apparently Howdy Doody (the original IRL cowboy puppet show) had:
>a shopkeeper with a strong dislike of clowns
>a mute clown who only spoke at the very end of the show and shed a single tear while saying goodbye
>behind the scenes there was a "Christmas Eve Massacre" when four cast members (puppeteers, live actors, and puppet voices) left
>the show was saved with large thanks to a voice actor, Allen Swift, who became known as the "Man of a Thousand Voices"
I think this will at least have a reference in Chapter 5, if it won't be majorly plot relevant with the cancelled cowboy puppet show tied to Tenna and Asgore.