Flowey staged the first soul rebellion : r/Undertale

What is your favorite Undertale AU and why? - Quora

Steam Workshop::raivbal

Undertale: Differences In Flowey Interactions Between Pacifist And Genocide Routes

The Story of PestiTale, Insanity! Tale Wiki

Undertale Text Strings ― Perchance Generator

UNDERTALE SPOILERS] When Flowey absorbed the six human souls, they eventually rebelled. What stops them from doing that when Flowey becomes Asriel again? - Quora

Frisk and Flowey, the kingdom's Royal Hunters! Undertale AU plus backstory in comments! (Drawn by Killb94) : r/Undertale

Toby IS making another Game about Gaster.

Steam Community :: Guide :: Complete Undertale Ending Guide

Toby IS making another Game about Gaster.

We already talked about what would happen if Toriel absorbed Chara's soul and died instead of Asriel, now let's do it again except what if it was Asgore? : r/Undertale