Wikipedia Contributors wrote:
Compared with traditional productions of the opera, Papp's Pirates featured a more swashbuckling Pirate King and Frederic, and a broader, more musical comedy style of humour. It did not significantly change the libretto, but it used an adapted orchestration and made a number of key changes and other minor changes in the score. The "Matter Patter" trio from Ruddigore and "Sorry her lot" from H.M.S. Pinafore were interpolated into the show. The production also restored Gilbert and Sullivan's original New York ending, with a reprise of the Major-General's song in the Act II finale.