Dennis, released in Europe for the Game Boy, is an action-adventure game based on the popular comic strip character. The gameplay likely involves navigating through various levels, potentially solving puzzles or engaging in light platforming challenges.  The game's European release targets fans of the comic and younger audiences. Details about the specific developer and publisher require further investigation.  The comic strip's popularity is probably the reason for the game's creation.

Dennis (Europe)

Dead Heat Scramble (Japan)