The Super Mario Bros. Super Show! - Season 1 - Eps 6: Rolling Down the River
Mario and Luigi disguise themselves as Riverboat Gamblers to rescue the Princess who is held captive on Captain Koopa's sidewheeler, "The Sinister Star".
About The Super Mario Bros. Super Show!

Title: The Super Mario Bros. Super Show!
First Air Date: 1989-09-04
Last Air Date: 1989-12-01
Status: Ended
Rating: 6.9/10 (from 84 votes)
Language: EN
Seasons: 2
Total Episodes: 65
Network: Syndication
Genres: Animation, Sci-Fi & Fantasy, Comedy, Kids
Production Companies: DiC Entertainment, Binder Entertainment
Synopsis
In 1989 the two most famous plumbers from Brooklyn burst out of the Nintendo game world and onto television screens across America. The Super Mario Bros. Super Show! aired weekday afternoons and brought Mario, Luigi, Princess Toadstool and King Koopa more thrilling adventures as cartoon characters. And if that weren't enough, each episode also contained live-action segments featuring Mario and Luigi running their Brooklyn plumbing shop - all before they were flushed down a drainpipe into the Mushroom World.
Cast

Louis Albano
Mario

Danny Wells
Luigi

Harvey Atkin
King Koopa (voice)

John Stocker
Toad (voice)

Jeannie Elias
Princess Toadstool (voice)