Instructions
 
Battle an enemy that is Robot or Cybernetic. These enemies are scattered throughout the game's multiple locations and typically have a steel outer frame. Also, their movements are typically very rigid, showcasing their exoskeleton design. 
Press the "Items" option for the battle menu. A list of your available options will appear. 
Scroll the list of items and touch your EMP Breaker item. A menu of possible options will appear. Touch the option "Use." You will then be able to select which enemy you want to attack. 
Attack the enemy that resembles a robot. If the enemy is a Robotic or Cybernetic type, they will be disabled for a few turns, allowing you to attack them without fear of retaliation.