Board Thread:Questions and Answers/@comment-27327020-20160404174206/@comment-25181180-20160425095413

Chara's full power only activate when we had exhausted the required kill count. Otherwise, Chara won't exist.

At the other hand, Asriel might've held back from killing us due to his feelings towards us.

Flowey can also modify his SAVE file and ours, altering the entire game. Several parts during the Photoshop Flowey fight is also inescapable, and he gives absolutely no time to rest. Other than the fact that he had deleted his SAVE file, he can SAVE multiple files at once while Chara could only do so when their power rully activates (in the end of Genocide Route) and modify the True Pacifist Route. Flowey has the power of 6 human souls, so just imagine when he has 7 including Frisk's. As said, he will be God, giving himself infinite power and a neverending lust for termination; making him even stronger than Asriel, who still have feelings.