PK Flash

PK Flash is a special attack that can be performed by Ness in both Melee and Brawl. It is a chargeable Neutral B attack. When the move is initiated, a sphere of green light appears above Ness. As the B button is held, the ball of light moves downwards and increases in power, until the B button is released, or until it is fully charged, at which point it explodes. The ball of light is arguably easier to control in Brawl than it is in Melee. PK Flash can be charged until it falls to the altitude from where Ness initiated the attack. It can be slightly moved horizontally and vertically by using the control stick. If the attack falls upon a platform or a higher level of a stage before it is detonated, it will disappear harmlessly. This can be a problem, especially in Brawl, since it falls below Ness' height when fully charged (but nonetheless, it is still considered fully charged if you let go of the B button right before it hits the ground). When performed in the air, it puts Ness into a helpless falling animation. Fully charged, without the influence of special conditions, it deals a maximum damage of 39% with huge knockback strong enough to knock people off the stage when fully charged. Due to Ness's accent, many players mishear "PK Flash", instead hearing any of a variety of phrases, such as "PK Pulse" or "PK Cross". However, when Kirby copies Ness, he clearly says "PK Flash" when he uses it, even though Kirby and Ness have the same voice actress.

Origin
PK (or PSI) Flash is one of Ness's unique moves in EarthBound. At its lower levels, it can only deal minor effects like crying and colds, but at the Ω level, it is capable of delivering one-hit KOs to all enemies. It is one of only two PSI moves which are unique to Ness, the other being PSI Rockin. (PK Flash was originally used by Ness, along with Lucas, in the Mother series, but only performable in Brawl by Ness.)

In Mother 3, Lucas would learn PK Flash after he was shocked by an electrical discharge. The PK Flash in Mother 3 didn't have any levels, so PK Flash could deal minor status afflictions like crying or one-hit KOs at any point of the game.Lucas is better than Ness in all his powers he is stronger