Board Thread:Questions and Answers/@comment-27801808-20160215082214/@comment-27701762-20160215084100

As in, literally nothing? You defeated Flowey and were immediately sent back to the save point? Because what should happen is that you walk through a door, see a short set of credits, and receive a phone call. If this did not happen, then something weird has indeed happened.

Otherwise, you got the Neutral ending. After defeating Flowey a special trigger loads that allows you to reach the True Pacifist ending. If you killed 0 enemies, then you just need to finish off the last criteria before fighting Asgore again.