im sorry, people who favor flowey, but sans is the official winner of flowey vs sans. please look below for the reasons. Also, holy hec, this was horrible.
flowey: +can save/load +is practically impossible to beat -has been beaten by 7 kids -save/load will not be used, because its unfair -is impenetrably proud of himself -can't exactly protect him self in normal flowey sans: +has gaster blasters +can hop timelines +knows how to keep his cool when fighting opponents like chara/frisk +is VERY fast -has 1 hp -gets tired, which can let the enemy go in for the kill the winner is sans.