W. D. Gaster

Background

W. D. Gaster was the royal scientist before Alphys, responsible for creating the CORE. Gaster's Followers relay various explanations as to what happened to Gaster. One iteration says that he "fell into his creation," another says that "his experiments went wrong," and the last one says he "shattered across time and space." Characters such as the River Person and Gaster's Followers hint at his existence. Similar to Sans and Papyrus, he speaks in a typeface different from the other characters.

Powers and Stats

Tier: Unknown physically, At least Low 8-C, possibly higher with his avatars inserted into reality, at least 2-B upon acknowledging his name/existence

Name: W.D. Gaster

Origin: Undertale

Sex: Male

Age: Unknown

Classification: The Man Who Speaks in Hands, Monster (formerly), Former Royal Scientist, Mystery Man, Impossibility

Dimensionality: Unknown

Attack Potency: Unknown physically (Has no noticeable way of interacting in his true form with reality and has no feat, he does have an in-game stat of 66666, however it is unknown where this puts him, implied to have some part in creating Deltarune), At least Small Building level, possibly higher with his avatars inserted into reality (Should be comparable to the other monsters), at least Multiverse level upon acknowledging his name/existence (Naming yourself Gaster causes the entire game to be reset)

Durability: Unknown physically (Gaster is completely unable to be harmed as he doesn't even exist, thus making it completely unknown what he can withstand, but it should be noted he seemingly still does "exist" even during totality destruction), At least Small Building level, possibly higher with his avatars inserted into reality

Striking Strength: Unknown physically, At least Small Building Class, possibly higher with his avatars inserted into reality

Lifting Strength: Unknown

Travel Speed: Unknown

Combat Speed: Unknown

Reaction Speed: Unknown

Stamina: Limitless

Range: Unknown physically, Multiversal with his existence acknowledged (Naming yourself Gaster causes the entire game to be reset)

Intelligence: At least Supergenius (Created The Core which which turns thermal heat into magical electricity and serves as a power plant for the entire Underground. Stated by one of his followers that it took Asgore a long time to find a replacement due to how smart Gaster was, another follower notes Gaster's brilliance was irreplaceable with this he should then be far more intelligent then Alphys. Hacked into the CORE, even overriding Mettaton's hacking in the process, could figured out a highly complicated math problem in a couple of seconds, correctly guessed the number of flies in a jar with a glance, and perfectly guessed the number of n’s in Mettaton’s name in a situation where the number of n’s was rapidly growing, while it was all being asked in a row. Now that he's shattered across space-time he likely has higher intelligence then even before)

Powers and Abilities:

Superhuman Physical Characteristics, Magic (All monsters are made of magic), Personal Domain & BFR (When one encounters a monster they get into a fight, a FIGHT is an encounter in a monster's personal domain allowing them to fight humans, this has various rules such as turn-based combat), Creation (Monsters can make weapons, clothes and even food from magic), Limited Spatial Manipulation (Monsters can at times influence the battle box), Transmutation & Healing (Monsters can turn their attacks into healing projectiles), Absorption (Monsters and humans can absorb the SOUL as long as the person isn’t the same species as them), Curtain Fire, Soul Manipulation & Essence Manipulation (All attacks in Undertale are to the SOUL), Resistance to Physical Attacks (All monsters bodies are attuned to their SOUL thus only attacks that can affect their SOUL can affect them), Soul Manipulation & Essence Manipulation (Can take hits to the SOUL)

Genius Intelligence, Cosmic Awareness (Shattered across all of space-time, can listen in on conversations while being outside of reality), Immortality (Type 5. The concept of death no longer applies to him), Reality Separation (Type 4. Completely outside of Undertale reality), Paradox Existence (Type 4. Exists and doesn't exist at the same time, no longer bound by any concepts as he's completely outside of everything), Omnipresence (Type 3. Gaster is shattered across time and space being everywhere and nowhere trapped to view reality from the outside), Nonexistent Physiology (Type 4. Gaster doesn't exist to the scale below even beings like Chara or Goner Kid. The mere act of acknowledging his existence or saying his name causes one to be erased or all of reality to reset. Even for the brief moments he can enter reality merely acknowledging him causes him to be completely erased), Acausality (Type 4. The concept of causality doesn't apply to him as he is outside of it, he can appear at any point in time he wants and is seemingly unaffected by resets), Existence Erasure & Nothingness Manipulation (Type 4. Even acknowledging Gaster's existence or merely saying his name will cause you to be erased completely from existence), Spatial Manipulation (Created a new room between two points that were previously right next to each other, and erased it afterward), Passive Technology Manipulation (Frisk's phone shuts down upon running into a follower)

Standard Equipment: None notable

Standard Tactics: Gaster seemingly sends in his followers or an avatar to briefly interact with reality while he listens in one situations from outside of reality.

Weaknesses: Gaster has a weak influence over reality being unable to come back in it for more then a short period of time, he is only able to briefly insert avatars into it.

Explanations

Reason why the SOUL is considered Essence Manipulation.

Gallery

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  Gaster's tarot card

Battle Records

Ness (Mother) - Ness's profile (Both were at Low 8-C)

Discussions (Link For Mobile Users):

Discussion threads involving W. D. Gaster