How to Spare Asgore?

The only way to stop his attacks is to defeat him first. Keep using the "FIGHT" command to whittle away Asgore's health, and heal up when needed. It can be a long and tense fight, but players should stay determined and keep learning his attack patterns until the end.

Can you spare Asgore in pacifist?

Pacifist Boss Tips: King Asgore

There is no way to peacefully end this fight. You must fight King Asgore. Make sure you are loaded with healing items and have your strongest weapon and armor equipped.

Is there any way to spare Asgore?

Asgore forces the protagonist to fight him, and the protagonist cannot spare Asgore. If any of Asgore's attacks hit the protagonist and they do not have enough HP to survive it, the attack drops their HP to 1 when it otherwise would have killed them. However, the next attack that hits the protagonist will kill them.