The Super Mario Bros. Super Show! - Season 1 - Eps 34: Mario Meets Koop-zilla
Koopa has eaten Dr. T. Garden's secret weapon -- Super Sushi -- and has been transformed into the huge monster "Koopzilla" who is terrorizing the city of Sayonara.
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)