Omega Flowey appears in Undertale, the role-playing game released by Toby Fox in 2015, as the monstrous final boss of the Neutral Route. Flowey, normally a small talking flower, absorbs human souls and transforms into a huge, distorted creature stitched together from plant, screen and machine parts. Clips and sounds from the fight spread through gaming forums, YouTube edits and soundboards, where short boss noises became reusable reactions. The yowl survived because it instantly signals that transformation, even for viewers who have never played the game themselves.