Even though it's not traditional Kirby, I'm going to shout out that more people need to play Mass Attack for the DS, which is currently available on the Wii U DS Virtual Console. It's basically a 2D Pikmin, with some of the craziest level variety I've ever seen in a videogame. It also has some really good unlockable mini-games, that are very well polished in their own right.
This is why I'm really excited for Forgotten Land since HAL has shown they can deliver quality experiences outside of the traditional Kirby experience. Even though Forgotten Land is their first 3D Kirby game, games like Canvas Curse and Mass Attack were also quite different and they really hit a home run with both on their first try. Hell, something like Star Stackers is a puzzle game on the Gameboy that I didn't experience until 2018, and it still blew me away by how good it was, and I'm someone that normally isn't big into these kind of games. So even though HAL is best known for traditional Kirby games that follow a certain template, they've proven time and time again they can do something different and still maintain a high level of quality.