In Huckleberry Finn what is the Royal Nonesuch?

It was a scam set up by the King and The Duke to steal peoples money the Duke said a speech to get the people excited for the play and the king came out naked and dance around for a little while and that was it

They told the audience to tell other people of the play to get them to come and scam the new people of their money for 2 nights then left on the 3 night to run away from the mobbing people