PK Thunder (PKサンダー Pī Kei Sandā?) is the Up Special Move for both Ness and Lucas. When used, it creates a bolt of lightning whose direction can be controlled using the control stick. As such, using PK Thunder will result in Ness and Lucas not being able to move or defend, because the control stick is used to aim PK Thunder. If either PK Thunder hits an obstacle, it will disappear, which can be done when the opponent is about to attack you.