Fun Fact:The only reason frisk can kill sans with 1 hit not because its hard its because of the amount frisk xp i mean he had 92 hp how can sans beat thar Me in 9 months later after reading this old comment of mine: What the heck was i was saying man
I've been messing around in the game files using Undertale mod tools and I can confirm in the monster setup file Sans does infact only have 1hp, Undyne the Undying has 23000hp, and Mettaton Neo has 30000hp but -40000 def.