Board Thread:Questions and Answers/@comment-31067473-20170714200704/@comment-28517148-20170715213913

Flowey was created after six humans fell through barrier. Entry #5 says that Determination was extracted from human souls, most likely theirs. Also, the one who can use Save/Load is indestructible - after every death/fail thay reappears in nearest Save Point, but six humans are dead. Conclusion - they weren't able to Save.