Super Mario World - Season 1 - Eps 6: King Scoopa Koopa
King Koopa goes into the fast food business and his food is a hit with everyone in Dome City, except for the Princess. But no one knows that Koopa sneaked in a side effect for those who eat his Egg Scoopa Koopa sandwiches, turning them into Chickadactyls. Only Mario and the Princess remain unchanged so it's up to them to stop Koopa.
About Super Mario World

Title: Super Mario World
First Air Date: 1991-09-14
Last Air Date: 1991-12-07
Status: Ended
Rating: 7.2/10 (from 41 votes)
Language: EN
Seasons: 2
Total Episodes: 13
Network: NBC
Genres: Animation, Comedy, Kids, Action & Adventure, Sci-Fi & Fantasy
Production Companies: Telecinco Cinema, DiC Entertainment, Reteitalia, Nintendo
Synopsis
Mario, Luigi, Yoshi and Princess Toadstool are on Dinosaur Island foiling the plans of King Koopa and his Koopa kids.
Cast

Walker Boone
Mario (voice)

Tony Rosato
Luigi (voice)

Tracey Moore
Princess Toadstool (voice)

Andrew Sabiston
Yoshi (voice)

Harvey Atkin
King Koopa (voice)

John Stocker
Oogtar (voice)