History Anime / Megazone23

** Most obvious between Parts I ([[Anime/SuperDimensionFortressMacross Haruhiko Mikimoto]]'s character designs) and II ([[{{Anime/Kite}} Yasuomi]] [[Anime/MezzoForte Umetsu]]'s), which feature the same characters, but with mostly more natural hair colours.

* BloodierAndGorier[=/=]HotterAndSexier: While the first OVA was hardly kid friendly, featuring its fair share of nudity and some scenes of gore, the second OVA absolutely '''demolished''' the first in those areas. The second OVA was filled to the brim with graphic depictions of extreme gore and bloodshed that would make Creator/QuentinTarantino orgasm, and speaking of orgasms, the women in the second OVA were so sexed up that one couldn't go a full five minutes without a slipped nipple. And that isn't even getting into Yui and Shogo's completely-gratuitous sex scene and the sequence of Yui and the female gang members in the shower. This is because ''Part II'' is the work of [[{{Anime/Kite}} Yasuomi]] [[Anime/MezzoForte Umetsu]] and Ichiro [[MacrossMissileMassacre Itano]].

* CoolBike: The Garlands, which not only transform into a humanoid mech mode, but also potentially have a direct connection to the Bahamut super computer. That said, they're not actually very good bikes. They can go very fast, but it's all brute thrust, while at the same time [[MasterOfNone they're extremely bulky and unmaneuverable due carrying all their robot parts around with them]], unlike the Hargans. Amusingly demonstrated by Shogo causing several traffic accidents as he tries to drive it the same way as a normal bike.

* BlandNameProduct: A fairly notable aversion - brand names are used very regularly. Be honest, when ass the last time you saw an actual can of Coca-Cola in an anime?

Released between 1985 and 1989, ''Megazone 23'' is historically signficant for being one of the very first {{OVA}}s and also was one of the first anime to extensively interweave music with the plot. The story itself was a mindbender at the time, and is a forerunner of such later American works as ''Film/TheMatrix'' and ''Film/DarkCity''. Since then, the plot twists and the character types have become standard in anime, almost cliche in some instances, but as a certified classic it is still worth seeing.

* DistressedDamsel: Eve is mostly a hostage of the military through the first two installments.

* WritersCannotDoMath: When Eve warns Shogo that the conflict that forced humanity to evacuate Earth will begin again 500 years after it started, in the Japanese version, she states that about 432,126 have passed since then, which is actually roughly about ''50'' years. The Streamline dub is even less accurate, stating that 43,126 hours have passed, which is roughly about '''''5''''' years. Only the ADV dub comes close, giving us the time length as 4,321,260 hours. No matter how you slice it, though, 500 years is actually 4,380,000 hours.

* WritersCannotDoMath: When Eve warns Shogo that the conflict that forced humanity to evacuate Earth will begin again 500 years after it started, in the Japanese version, she states that about 432,126 have passed since then, which is actually roughly about ''50'' years. The Streamline dub is even less accurate, stating that 43,126 hours have passed, which is roughly about '''''5''''' years. Only the ADV dub averts this, correctly giving us the time passed as 4,321,260 hours.