- Like his brother, his name comes from a type of French mustard.
- Like Dijon in the episode Attack of the Metal Mites, he mispronounces Flintheart Glomgold's name.
- It's unknown if he is older or younger than his brother, though considering how much taller he is than Dijon, it's most likely the former.
- According to some dialogue when Dijon and Poupon reunite, it's revealed that Poupon was always the moralistic brother while Dijon was always a thief ever since the two were kids.
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