[[Kirby]]'s ability introduced in [[Kirby and the Forgotten Land]]. As the name suggests, [[Kirby]] expands his mouth to partially swallow an object and thus assumes full control over it. The mysterious vortex gave Kirby the new power.

Official variants of Mouthful Mode include:

* [[Arch Mouth]]
* [[Big-Rig Mouth]]
* [[Car Mouth]]
* [[Coaster Mouth]]
* [[Cone Mouth]]
* [[Dome Mouth]]
* [[Light-Bulb Mouth]]
* [[Pipe Mouth]]
* [[Ring Mouth]]
* [[Scissor-Lift Mouth]]
* [[Stairs Mouth]]
* [[Storage Mouth]]
* [[Vending Mouth]]
* [[Water-Balloon Mouth]]
ほおばりヘンケイ