First Strike

The First Strike is a technique used in Paper Mario and Paper Mario: The Thousand-Year Door, and the Mario & Luigi titles. In Paper Mario, Goompa first mentions this to Mario as they walk through Goomba Village. To do a First Strike, Mario can simply jump on the enemy or hit it with his Hammer, depending on whether or not the enemy has spikes. The First Strike helps Mario in battle, as it allows him to damage or drain all HP from an enemy before taking a turn.

The First Strike can also be used against Mario by enemies. For example, if a Koopa Troopa successfully attacks Mario with its shell, Mario will get hit by the First Strike and take damage. First Strikes from enemies can be avoided by dodging the attack or by using the Chill Out Badge.

In Paper Mario: The Thousand-Year Door, Mario will do a First Strike with an Action Command, doing more damage and possibly defeating weak enemies, such as Goombas and Dull Bones.

First Strikes in the Mario & Luigi titles is similar to Paper Mario's First Strikes with one key difference - a first strike on one enemy in the field will damage all enemies in the battle. However, in Mario & Luigi: Superstar Saga and Mario & Luigi: Partners in Time, the First Strike with a hammer works differently. When Mario or Luigi hammer an enemy on the overworld, all enemies in the battle will become dizzy. In Mario & Luigi: Bowser's Inside Story, a First Strike with a hammer will instead damage all enemies. Bowser can also use First Strikes by punching or breathing fire on the enemy.

Enemies can also do first strikes to one of the characters. If the enemy or one of its projectiles hits a character in the back, they trip and cannot get up until it is their turn or if they are damaged by an attack.

Trivia

 * The only enemies that cannot be harmed by first strikes are bosses, mid-bosses (Such as Kent C. Koopa), M. Bushes, and Hurt Plants.