PK Fire

PK Fire (called PSI Fire in the English version of Earthbound) is a special move that can be performed by Ness. It is done with forward-B, and is a projectile attack. When performed on the ground, It travels in a straight line until it hits an enemy or destructible portion of the stage. If it does not hit either of the aforementioned objects within a few feet, then it disappears. When it hits, it creates a pillar of fire that blocks the enemy from passing through it. It can also be done from the air, which causes it to move in a diagonal fashion, similar to Sheik's needles.

Lucas's version of this attack works almost the same as Ness's version, except when used in the air it flies the same way as when used on the ground (in a straight line).

In Earthbound, the attack is actually not learned by Ness (Something Paula's Trophy in Melee explains). It is described as a wave of fire shot from the fingers and is capable of damaging rows of enemies.