Bonk's Adventure (Game Boy)

Bonk's Adventure
Also known as: GB Genjin (JP), B.C. Kid (EU) Developers: Metem, Mutech Publisher: Hudson Soft Platform: Game Boy Released in JP: November 27, 1992 Released in US: December 1992 Released in EU: 1992 This game has unused code. This game has a hidden level select. This game has regional differences.

This page is rather stubbly and could use some expansion. Are you a bad enough dude to rescue this article?

Unused Level Select

An unused Level Select routine can be found at 07:$4000 in the Japanese version or at 01:$4224 in the USA/European versions, however no code ever calls it.

In the Japanese version use the Game Genie code 009-23E-5D5. During the game, press B + Select.

In the USA/European versions, using the Game Genie codes 339-02F-7F3+429-03F-C42 will replace the Stage display screen with the Level Select as well as skip the button code to call it. With this code stages are selectable, but there are some issues before the level starts.

Regional Switch

The USA/European versions of the game has exactly the same ROMs, except differences in ROM headers. Each ROM contains both the European and the USA title screens data, controlled by the hardwired switch at the 00:$0003 in ROM. For the USA version its value is 0, for the European version 1 correspondingly.

Using the Game Genie codes 010-03F-E6A (for the US version) or 000-03F-E6E (for the European version) you can switch the game to the other's title screen mode.

Regional Differences

The ending differs between the JP and overseas versions:

JP	International

After the rescue scene, the JP version follows with the credits and a song. The US version just ends with an image with a flashing "Bye-Bye" (which is not shown at all in the JP version).