Flowey, BadEndFriends Wikia

Flowey is the main villain of the Indie game Undertale. He was once a young Monster of a royal lineage until his best friend's plan to free humanity failed, he'd later come back from the dead after the royal scientist, Alphys, tampered with a power known as Determination.  Flowey is the spirit of Asriel Dreemur embodied in a flower after the plan of his best friend Chara, who at the time was dying, failed. Asriel and Chara were best friends even though they were from different species, Chara was

Genocide Frisk, BadEndFriends Wikia

How do your stats change if you kill a single monster in Undertale? - Quora

Asriel Dreemurr (Flowey), VS Battles Wiki

According to several wikis, these are the morality of the Undertale/Deltarune characters: : r/Undertale

Proof from the wiki that Chara is evil : r/CharaOffenseSquad

Flower Child & Gaster, The Undertale EXEclopedia Wiki

Evil Gloating - TV Tropes

Deformed Frisk, Undertale exe and creepypasta Wiki