- What Could Have Been: Bibi had an entirely different design in initial drafts, resembling a cross between his father and the Iron Nanny. As such, Chiko being scared of his wheel tracks is likely an Orphaned Reference to this original design, which would've made his footprints similar to Iron Nanny's and thus given Chiko a good reason to be afraid.
http://tvtropes.org/pmwiki/pmwiki.php/Trivia/KikoRikiEp73ByeByeBibi
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