Board Thread:Questions and Answers/@comment-27973255-20160313201444/@comment-26887879-20160423173714

First, you need to finish PS Flowey battle, then after the battle he returns to his normal form, you just keep sparing him until he gives up and runs away. After the battle, you get an exit (which will end Neutral route), when you exit you'll get a phonecall from Sans and others about how's it going in the underground, after that Flowey will appear again, telling you that he can get you a better ending and you will be returned to your save point before battling Asgore. Do not battle Asgore, go to the Core Enterance and there you will recieve a phonecall from Undyne....