Bonk's Adventure (Game Boy)

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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).

References#