Absentee Actor: Between four heroes, one Big Bad and seven Koopa Kids, there were bound to be some absences. "Life's Ruff" is a special case. Most of the regulars are absent, but so is Mario himself—making for the only episode of the three shows that he didn't appear in. (Incidentally, this means Luigi is the only character to appear in every episode of every show.)
Dub Name Change: The writers made up their own names for the Koopalings, called the Koopa Kids in the actual show, before the English version of The Manual was final. That, and some of the references Nintendo ended up using would likely go over most kids' heads anyway.
What Could Have Been: Going by concept art in the writers bible included on the official DVD set, Mario was apparently going to use the Tanooki Suit at one point, but it never made it into the final product due to network budget cuts.
Working Title: "Kootie Pie Rocks" was originally titled " Strawberry, Chocolate or Vanilli?"