While most of Sunsoft's original IPs originated on the NES, they did make one on the Game Boy--Trip World. A platformer featuring the bunny-like Yakopoo, whose form can be adjusted by the player or by items ingame, it was a short yet audiovisually pleasing romp on the monochrome DMG, and has gained cult status in the years since its launch.
I've always adored this one, the cutesy character design and easygoing nature, and the classic Sunsoft banger soundtrack. It was on my radar for producing a color version of ever since before I released my Kirby's Pinball Land hack, being there for a good while until earlier this year, when Limited Run Games announced a color remaster utilizing their "Carbon Engine" tech for emulation of old stuff. In addition to repros for hardware and behind-the-scenes stuff for the digital releases, it contains a full GBC conversion done by toruzz, known in the romhacking scene for colorizing Super Mario Land 1 and 2, as well as his long-in-dev hack of For the Frog the Bell Tolls.
The Switch version of this release dropped today, with it coming to PS4/PS5/PC sometime later. Although I found the emulation to be a bit dodgy playing the DX version, the colors are spectacular. Here's some screens I took:
BONUS: A detail from one of the bonus videos that got me
Director Yuichi Ueda intended for Yakopoo to look like a chinchilla.
Not a bunny.
My furry presence is a lie.