That literally doesn't prove anything because of how vague that statement is.



I mean Gwyn is strong, but Asgore is a mage of fire. Just like many undead who have defeated Gwyn. Only Asgore's flames are a lot more OP because of their sheer range and reach.



Gwyn would have to be at his prime (War against the dragons) to beat him since his Lordsoul isn't split and his skills are sharper.