What is the first fully 3D mainline Kirby game?

The first fully 3D mainline Kirby game is Kirby and the Forgotten Land. Released for Nintendo Switch in 2022, it moves Kirby's core platforming into three-dimensional stages rather than using a primarily side-on 2D or 2.5D layout.

The distinction matters because earlier Kirby games had already used 3D graphics. Kirby 64: The Crystal Shards, released in 2000, features 3D computer graphics but keeps its gameplay on mostly fixed 2.5D paths. It was the first Kirby game with 3D visuals, not the first mainline game with fully 3D gameplay.

Kirby and the Rainbow Curse also uses three-dimensional presentation, but it is a spin-off built around drawing paths with the Wii U GamePad. Kirby's Epic Yarn likewise remains a side-scrolling platformer despite its distinctive fabric-based art style.

Forgotten Land was designed around freely navigating 3D environments, exploring stages, rescuing Waddle Dees, and fighting enemies from multiple angles. Its Mouthful Mode, upgradable Copy Abilities, and optional Bandana Waddle Dee co-op all support that larger transition.