- Like all "Frog" (「ガエル」 ("Gaeru")) monsters and their "Toad" allies, this monster's Japanese name is a pun. It plays on the word 寝返る (negaeru "to switch sides") which aptly describes its effects. This word contains the morpheme 寝 (ne) which refers to the "resting" that "Centerfrog" is indulging in.
- "Flip Flop Frog" is another "Frog" with a "double-crossing", control-switching effect.
- "Centerfrog"'s belly has a black circle, a literal representation of its "black-hearted" disloyal character. The black circle comes from the word 腹黒い (haraguroi literally "black-bellied").
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