Crystal Quest is a Game Boy game released in the USA. It likely involved puzzle-solving elements, given the name. While specifics on its gameplay mechanics are currently unknown, it's reasonable to assume it was a single-player title fitting the typical Game Boy game style.  The game's developer is also currently unknown but likely a smaller company specializing in the Game Boy market during that era.

Crystal Quest (USA)

Crayon Shin-chan 2 - Ora to Wanpaku Gokko Dazo (Japan)