http://tvtropes.org/pmwiki/pmwiki.php/Recap/MarioGoesToSubwayAndPurcahses1TunaSubWithExtraMayo
Yes. This is an actual episode
When Mario stumbles onto a dark secret at his local Subway, he, Tari, and Whimpu must work to escape the dungeons under the sandwich shop... and get the mayo for Mario's tuna sub.
- Cannibal Clan: The fish people running Subway in the Mushroom Kingdom use themselves for ingredients. Mario, Tari, and Whimpu are locked up for their discovery of this.
- Indy Escape: After Mario gets grabs the jar of mayo in the dungeon, this ends up happening due to a giant meatball summoned by Yugi's trap card.
