To win the fight on a Pacifist run, you must ironically FIGHT until his HP is nearly depleted, as he destroys the "MERCY" button at the start of the encounter. Once his health is low, he will kneel, allowing you to finally choose the "MERCY" option. Preparation & Gear
Many players look for simulators to practice the difficult dodging mechanics without replaying the entire game. Yet Another Bad Time Simulator asgore fight pacifist simulator
Lowering Stats: To make the fight easier, Talk to Asgore 3 times using the "ACT" menu. This will lower his Attack and Defense. To win the fight on a Pacifist run,
Asgore: The Unlikely Hero of a New Generation he will kneel