Flowey the Flower is a fictional character and the primary antagonist of the 2015 video game Undertale, developed by Toby Fox.

The first NPC the player encounters in the game is Flowey, who initially appears as a friendly and helpful talking flower, but quickly reveals himself to be a megalomaniacal sadist with more sinister goals.

Critics and fans have praised Flowey's characterization, well-constructed backstory, occasional use of breaking the fourth wall, and boss fights.

The screen on Flowey, which displayed various visuals, had some art assets planned by Everdraed, but due to potential content and licensing issues, they were scrapped.

[2] By the end of the game, the player discovers that Flowey is actually Asriel Dreemurr, the son of characters Toriel and Asgore, having been turned into a flower.

The concept for an adult Asriel Dreemurr's boss battle was inspired by one of Toby Fox's programs where he would test visual effects; he created an image of Toriel with evil eyes, which urged him to implement it in the game because he thought it "looked cool".

The boss fight was almost exclusively designed by Fox, though artist Temmie Chang contributed "sepia-tone intro-style images" to the battle.

Covertly following the player throughout the game, Flowey appears again directly after battling Asgore and finishes him off in order to obtain and use the power of the human souls.

He apologizes for his misdeeds and uses the power of all the SOULs to break the barrier, thus freeing the monsters which in return, ultimately reverts him back to Flowey.

It is implied that he is very successful and well-liked in his hometown as it is shown that he has multiple awards in his room and is viewed positively by his friends and town locals.

[11] Japanese Role-Playing Games states that Flowey is an example of a parodic guiding character directly inspired by the Mother series.

Flowey is motivated by curiosity for its own sake, and believes he has the strength to see the game's "no mercy" route for himself, insulting those who would not play it but still watch it to see what happens.

"[14] Stating that he has "one hell of a theme song", he praised the entire fight sequence as "spectacular", saying that it "justifies even the slowest of Undertale's setups".