AU Sans Battle Royale

FIGHT
SANESS kills everyone

KO!

The real fight
Everyone is seen walking until the Illuminati cursed everyone to fight each other

FIGHT!

Underswap Sans: I THE MAGNIFICENT SANS, WILL STOP YOU

US Sans uses all of his bones and it turns the screen boneish and everyone dies

KO!

In a researched battle or a show that the strong guy/gal beats the weak guy/gal
Probably Error!Sans wins.