River City Girls Zero is a 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.
- This is the first time the game has seen an 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.
- Other ports of the game are being considered down the road.