Talk:Asgore Dreemurr/In Battle/@comment-29079468-20160715232552/@comment-27701762-20160715232920

Learn his attacks, make sure you have some healing items. If you have the Pie from the beginning of the game, consuming it during the fight drops his attack and defense. If you don't, you can talk to him three times to get the same effect.

Then just attack when you can and dodge his attacks.