Well, this is a bit surprising. Of all the consoles in the world, they decided to release it for the GameBoy Color? Perhaps they are trying to invoke nostalgia.
Fast food chain McDonald’s has released a new game for the said console in celebration of one of their mascots, Grimace. This release coincides with the establishment's special menu to celebrate the mascot’s birthday. The game is called Grimace’s Birthday, a platformer featuring the said character. Gamers can also play as other classic characters such as Birdie the Early Bird and the Hamburgular.
If you’re interested in playing this title, you can grab it for free on the official website for Grimace’s Birthday, and the ROM can be downloaded here to be run on emulators or actual Game Boy Color hardware.