* CultClassic: Like with its precursor WesternAnimation/FlipTheFrog, the series never achieved mainstream popularity and had a short lived run, but it has gained a modest but loyal fanbase in recent years due to the series surrealistic qualities.
* FriendlyFandoms: Like with ''Flip the Frog'', fans of ''Willie Whopper'' tend to overlap and often be acquainted with fans of the works of Creator/FleischerStudios (i.e. WesternAnimation/BettyBoop, ComicStrip/{{Popeye}}) due to their series having very similar comedic/surreal tones to each other due to the influence of ex-Fleischer animation staff (mainly Creator/GrimNatwick) working on Flip.