Acchi is an enemy that has only appeared in Kirby: Squeak Squad so far. It resembles a red fiery lizard-like dragon and gives the Fire copy ability when inhaled. He can spit out fireballs that don't go very far but continue to burn for a while after touching the ground and can still be a hazard.
Kirby needs to do a super inhale on one as they are too heavy to inhale normally.
His name is derived from the Japanese phrase acchi, which is often said when something is very hot, and explains why he shoots out flames. However, Acchi sneezes his flames out, so it might be a pun on achoo combined with acchi.