Aaron is an enemy that can appear in Waterfall. He is a brown muscular merhorse (or rather a sea horse) with a long, winding green tail and a twelve-pack.

His lines are vaguely flirty as well as creepy, and he adds a winking face to the end of every line he speaks.

Powers and Stats

Tier: 9-A

Name: Aaron

Origin: Undertale

Gender: Male

Age: Unknown

Classification: Monster, Merhorse

Powers and Abilities: Superhuman Physical Characteristics, Inorganic Physiology (Every monster in the game is stated to be made of magic), Non-Physical Interaction (Magic is shown to be capable of harming ghosts, as shown in the Mad Dummy fight where magic attacks are the only way to harm him as opposed to physical attacks), Flight, Danmaku, Soul Manipulation (Can injure the soul through damaging the body with their regular attacks), Water Manipulation (Can weaponize his own sweat), Magic

Attack Potency: Small Building level (Has an attack stats of 24, making him comparable to monsters like Tsunderplane and superior to Papyrus)

Speed: Subsonic+ (Keeps up with Frisk alongside other waterfall monsters who are superior to Papyrus)

Lifting Strength: Unknown

Striking Strength: Small Building Class (Can damage Frisk with his muscles)

Durability: Small Building level

Stamina: High

Range: Standard melee range, higher with sweat

Standard Equipment: None notable

Intelligence: Average

Weaknesses: If monsters are not determined to kill their foes, and is facing against a foe with a strong soul and has murderous intent, their defenses will weaken

Notable Attacks/Techniques:

  • Flexing muscular arms move upward from the right and left sides of the bullet board. They speed up as the seconds go by.
  • Sweat falls straight & diagonally from the top of the box.


Notable Victories:

Notable Losses:

Inconclusive Matches:

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