* CrossDressingVoices: Mechazawa-Beta [[spoiler:(and Mechazawa when he is rebooted)]] is voiced by Creator/MikaKanai, ''Anime/GalaxyAngel'''s Vanilla H, and some ''Anime/{{Pokemon}}'' as Chikorita and Purin (Jigglypuff). She even reprised Mechazawa-Beta's voice in the live action movie!
* KeepCirculatingTheTapes: The manga ([[NoExportForYou 12 out of 17 volumes]]) and the anime's [=DVD=]s have been out of print ever since Creator/ADVFilms went bankrupt. Fortunately, Creator/DiscotekMedia re-licensed the anime in 2016. As of this writing, however, the manga is still in limbo.
* NoExportForYou: The manga was CutShort in the U.S. five volumes up to its final, right before ADV Films went down.
* PlayingAgainstType: The director of the anime version, Hiroaki Sakurai, is mostly known for directing cute series like ''Anime/DiGiCharat'', so directing a series starring a bunch of decidedly ''un''-cute delinquents was a radical departure for him. However both series relies on gags and Di Gi Charat sometimes feature ''un''-cute characters.
* RealLifeRelative: Creator/GregAyres voices Hokuto’s lackey while his brother Creator/ChrisAyres has a few minor roles.
* RoleReprise: Creator/LuciChristian and Creator/HilaryHaag reprise their roles as Dejiko and Puchiko respectively after previously voicing them in ''Anime/PanyoPanyoDiGiCharat'', though this time they're voicing their original selves.
* StuntCasting: Music/MegumiHayashibara is [[{{Gonk}} Maeda's Mom]], [[RuleOfFunny if you can believe it]]. Made even funnier given that Maeda's Mom never speaks a word, only ever doing an irritated moan.