The Crimson Jazz is a type of Emblem Heartless that appears as an enemy in Kingdom Hearts II. It is one of several "Mage"-type Heartless that specifies in a particular magical element. These can be recognized by their crimson-coloured bodies with yellow flame patterns on their lower bodies. They are also the largest members of the Mage Heartless family.
Appearing across multiple worlds, the Crimson Jazz is a small, cone-shaped enemy that uses the power of fire in battle, though not quite in the same manner as its predecessor, the Red Nocturne. It is capable of releasing fiery shockwaves upon its foes after storing up magical energy and can also lay magical mines upon the ground that can track targets.