Back when I was young I remember watching one of the Super Mario cartoons ( I think it was on Fox Family). I recall the episode being about Koopa and his gang making a hamburger stand type thing, and sold some kind of poisonous burgers to Mario, Luigi, Princess, Toad, and Yoshi. That's the main thing I remember from the episode. Does anyone remember this particular episode and which one of the Mario cartoon series it was off of? I'm pretty sure it was an actual episode, unless my mind is playing a trick on me. Thanks.

Was it the episode King Scoopa Koopa?

http://youtube.com/watch?v=cMpYsWqJpV0

Yes that was it! Thanks, TurboDuo :D Brought back some memories.

I saw that episode a long time ago.