River City Girls Zero is an updated localization port of Shin Nekketsu Kōha: Kunio-tachi no Banka. Featuring the game in its original "16-bit glory", it adds new features such as a new anime opening, manga cutscenes, and a song from Megan McDuffee. The game include two translations in English: Literal (Original in the new update) and New (RCG). The first, tranlate the original dialogues from the original game, while "RCG" adapted the dialogues, trying to match the personalities that the characters have in River City Girls. Also, it include translation into French, German, Italian, Spanish, and the original dialogues in Japanese.
Kyōko shows Misako that she found a mysterious video game about their first adventure together. They discover that Kunio and Riki appear on one of the labels of the cassette, so they attempt to find out how to play it. Kyoko also found an SNES, and Misako plugs the console into a HDTV.
They think the game is very fun, and want people to know about its existence. They doubt if an old video game could be liked by people, so they think that adding an animated intro, new songs, Manga cutscenes, and a new translation might a good idea.
- Main article: Shin Nekketsu Kōha: Kunio-tachi no Banka#Gameplay
- Main article: Shin Nekketsu Kōha: Kunio-tachi no Banka#Characters
- This is the first time the game has seen a release outside of Japan, as it was originally a Super Famicom exclusive.
- This updated release sets the game as a prequel to River City Girls, with it being the original debut of Kyōko and Misako.