A handheld spinoff of GB Genjin, the Game Boy version of Hudson Soft's celebrated Bonk, which here changes register: instead of platforming levels, a realm of activities and minigames built around the character. It was published in Japan and in Japanese.
Like so many side branches of the era, it was aimed at those already won over by the prehistoric big-head. Today it's interesting as an example of a very '90s practice: taking a successful mascot and trying it in every format to see what stuck.

If you liked this one