Board Thread:General Discussion/@comment-26006155-20200107155350/@comment-26907577-20200119002059

Wrong.

Flowey does not attack you when you do a normal Reset. Just comments about what he asked you to do at the end of the last Neutral... Or doesn't show his face at all if you killed him.

Also, Toriel remembers that after anything but a True Reset. And it's not specific to her; Papyrus and Undyne both comment pre-battle about how they feel like they want to be your friend if you befriended them previously. Undyne pushes the thought aside. I'm not actually positive about Papyrus.