Photoshop Flowey

Photoshop Flowey is the final boss of Undertale's Neutral Route and an extremely powerful form of Flowey which is attained by him absorbing the 6 human souls.

Battle
Photoshop Flowey will come into the screen as a sillhouette, then revealing himself. Flowey will laugh menacingly and start to attack the player. Every once in a while, the television screen on Flowey will cut to static as the player is taken to a minigame where they have to dodge attacks to get to the ACT button. Once this is done enough times on different minigames, the human souls will come out and heal the player. Flowey's defense will drop to 0 and the player can fight them, but Photoshop Flowey was only joking around and heals himself back to full health. He then fires two attacks at the player, keeping them barely alive. The human souls then circle around Flowey and defeat him.

Trivia

 * Photoshop Flowey's second head resembles the Determination Extraction Machine in the True Lab and Gyftrot's head.