Wonderswan Reverse Engineering

Edit on Github | Updated: 17th May 2024


Welcome to our page dedicated to Bandai Wonderswan reverse engineering! The Wonderswan is a classic video game console that was only ever released in Japan (on 4th March 1999).

If you’re interested in learning more about the technical aspects of this console and how it works, you’ve come to the right place. On this page, we’ve compiled a list of links to other pages that cover various topics related to Wonderswan reverse engineering.

Whether you’re interested in understanding the hardware architecture of the console, analyzing game code, or exploring the many mods and hacks that have been created by enthusiasts over the years, you’ll find a wealth of resources and information on the pages we’ve linked to. So grab your Wonderswan, and get ready to dive into the exciting world of reverse engineering!



The CPU used in the WonderSwan was the NEC V30MZ, which is a microprocessor based on the NEC V30 architecture. The NEC V30MZ CPU in the WonderSwan handheld console ran at a clock speed of approximately 3.072 MHz. The NEC V30 is an extended version of the Intel 8086 microprocessor, and it offered improved performance and compatibility.


Their were 109 games released for the original Black and White Wonderswan and 91 for the newer Wonderswan Color console, both types play on the color and crystal versions.

Visual Novels

Terrors series

Unless you can read Japanese you will not get much out of the three Terrors games on the wonderswan, however Tara A. Devlin has uloaded and english read through of the complete games on youtube. They are excellent and well worth a watch:

Ring Infinity

B&W Games enjoyable without reading Japanese

This is a list of the games you can enjoy without being able to read any Japanese:

  • Buffers Evolution - Platformer Racing game
  • Crazy Climber
  • D’s Garage 21 Koubo Game Tane o Maku Tori - Puzzle game
  • Densha de Go! (Although it is hard to play without some basic japanese) - Train simulator
  • Engacho!- Puzzle game
  • Final Lap 2000 - Made-7 style Racing
  • Fishing Freaks - Bass Rise - Fishing game
  • Ganso Jajamaru-kun
  • Glocal Hexcite
  • GunPey - Puzzle game
  • Kaze no Klonoa - Moonlight Museum
  • Lode Runner
  • Magical Drop
  • Makai Mura
  • Mingle Magnet
  • Moero!! Pro Yakyuu Rookies
  • Nice On - Golf Game
  • Ou-chan no Oeka-ki Logic - Puzzle Game
  • Pocket Fighter - Beat em up
  • Puyo Puyo Tsuu - Puzzle game
  • Puzzle Bobble - Puzzle game
  • Rainbow Islands - Putty’s Party
  • Rockman & Fotre - Mirai Kara no Chousensha
  • Sennou Millennium
  • Shin Nihon Pro Wrestling
  • Side Pocket - Pool game
  • Sliter Link - Puzzle game
  • Soccer Yarou! - Challenge the World - Football game
  • Space Invaders
  • Tare Panda no GunPey - Puzzle game
  • Tekken Card Challenge
  • Trump Collector - Bottom-Up - Card game
  • Trump Collector 2 - Card game
  • Turntablist - Rhythm game
  • Umizuri ni ikou - Fishing game
  • Wasabi Produce - Street Dancer - Rhythm game
  • Wonder Stadium