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- Chill Cat
- Crinkly Wrinkly
- Flurry (non-speaking)
- Ted Viking and Foxy (non-speaking)
- Diving Belle (non-speaking)
- Mrs. Gnarlio
- Gnarlio Jr.
- Rad's dialogue "Quick K.O.! Cry on it!" was cut in the Swedish dub.
- The beginning where K.O. and Rad are near a burning microwave, the fire is colored green as because Standards & Practice proclaimed that kids would imitate the act. The green fire internally is referred as "magical fire."
- From Toby Jones' Tumblr post, the episode was from a super old idea with a different premise about Enid trying to be a cool employee and not care when things went wrong at the plaza. The themes from the original premise was shifted to a later episode. The only thing that retained from both versions is the ending about the pests growing and changing taking from Enid's speech.
- The language and mannerisms of the pests are meant to be satirical.
- Rad's affinity for music was hinted in this episode as the next episode "You Are Rad" established that affinity.