* {{Blooper}}: In the second episode of the Japanese version, the professor who explains plot points to the audience refers to Koon-no-Kami as Inari-no-Kami. The latter was [[WhatCouldHaveBeen his name early in the show's development.]] This line was eventually redubbed with the proper name.
* ExecutiveMeddling[=/=]ProtectionFromEditors: Started in the former, ended in the latter. Satoru Akahori mentions in a 1991 interview that in the show's early stages there was a lot of intervention from Bandai, including forcing them to add things in at the last minute. But by the latter half of the show, everyone, including the network, had essentially given the staff free reign of the series. The increasing level of freedom led to the show getting crazier as it progressed, and the ratings climbed accordingly. Formuliac elements at the beginning of the series were lessened as well, such as reliably-episodic appearances of the Rescue Team and the Supreme Catatonic, in favor of more flexible plot turnouts.
* FollowTheLeader: Accidental one at that. The approach they used for the new scripts worked so well it went to influence later shows (released for the US market) like Manga/CrayonShinChan, Anime/LupinIIIRedJacket, and even [[Series/TakeshisCastle MXC]]!
* MissingEpisode: Two, actually. Although the episodes in question are {{Clip Show}}s.
* NamesTheSame: In August of 2014 Pizza Hut launched a [[https://pizzacat.pzh.jp/ "Pizza Cat"]] ad campaign in Japan. Both [[http://blogs.yahoo.co.jp/robototenko/39047028.html character designer Noritaka Suzuki]] and [[https://twitter.com/ENma_Dororon/status/501591097563291648 Yattarou's voice actor Kappei Yamaguchi]] amusingly noted that Pizza Hut itself was making the same joke they had made over 20 years earlier.
* PlayingAgainstType: Guido's Japanese voice actor Creator/JurotaKosugi is usually known for his deep, masculine voice. Sukashii is a rare instance of him using a much higher, younger-sounding voice.
* ShowAccuracyToyAccuracy: [[http://2nd.geocities.jp/lifezoids2/EDO-08.htm The original Supreme Catatonic toy released during the show's run featured a chrome fish gun with blue accents.]] When said weapon finally made a short appearance in the show's finale, it was given a color scheme that was [[http://static.tvtropes.org/pmwiki/pub/images/piranigun2.png primarily orange with red and yellow accents.]] The [[http://www.amiami.com/top/detail/detail?scode=FIGURE-014238 two]] [[http://www.amiami.com/top/detail/detail?scode=FIGURE-018964 new]] Supreme Catatonic toys released in 2016 opted for the latter, show-accurate colors.
* WhatCouldHaveBeen: If it hadn't been for licensing issues, these cool cats would've been in ''VideoGame/TatsunokoVsCapcom''.
** It was also recently revealed that there were tentative plans for a police-themed SequelSeries called "Kyattou Keisatsu Beranmee".
** Various preliminary names and titles were printed in magazines prior to the show's debut. Early names for Yattarou included "Bugmaru", "Hypermaru" and "Kagetora", and one early show title was "Mecha Neko Ninpou Chou Bugmaru" (roughly "Mecha Cat Ninjutsu Book Bugmaru").
** The show could have been translated faithfully [[note]]As faithful as dubs of anime made for syndication got in the early 90's, anyway[[/note]] if they had never lost the scripts.
** "A Mission in Manhattan" would have featured additional characters, including First Daughter Rabby, who is Princess Vi's New York counterpart. Instead of banishing those who offended her to Prisoner Island, Rabby would banish them to Alaska.