Bullet Board

The  is an unofficial term for the box in which the protagonist's SOUL can move around during encounters. In enemy turns, the appears and attacks are sent through it to hit the protagonist's SOUL; the player must maneuver the SOUL to evade attacks and avoid taking damage.

The board's dimensions and behavior may vary depending on the attack or the SOUL Mode the enemy is using. Notable examples include:
 * When Muffet sends her pet to attack the protagonist, the moves in a wavy pattern.
 * At the end of Sans's fight, the protagonist must push the towards the FIGHT button once he falls asleep.
 * Photoshop Flowey removes the entirely.