DeadHead uses DarkBreath on Kid.
Dark Breath is a Black enemy tech used in Chrono Cross. While attempting to steer the S.S. Invincible away from the Ghost Ship, Serge is confronted by a DeadHead. Occasionally, the DeadHead will exhale dark smoke at a single target for small portions of damage. This tech also has a low chance of inflicting a negative Status Effect.
Directing its line of vision toward a single opponent, DeadHead exhales a jet of dark smoke that smacks into the target.
Since this smoke expels from the lungs of a Black Innate creature, this name fits quite well.