Kirby and the Forgotten Land
It's Kirby's first full 3D adventure! You'd think that would be enough of a selling point, but nah. This game also features Mouthful Mode, a slightly disturbing ability Kirby gets where he can wrap his body around inanimate objects and gain new abilities depending on what he tries to swallow.
This is the game with "Carby", and that's all you need to know.
Unlike Star Allies, this Kirby game is much more recent, so the rest of this post will be behind a spoiler tag.