Lady Black Hat

At the moment, little is known about her weaknesses.

Interdimensional Travel: She's able to travel to other universes with no assistance.
Resistance to Toxins and Acid: In one of the Villainous Comics, Black Hat drank by mistake the most corrosive and toxic component ever created, that Flug left in his cup; she spat it out on 5.0.5.'s face, deeming it too sweet for his taste.
Fourth Wall Awareness.

Telekinesis: In the same episode, Black Hat is shown to have the ability to choke people by simply using her mind. She does this to Dr. Flug as a warning for him not to boast about himself.
Weather Manipulation: In "Villainy In Monte Macabre", Black Hat summoned a thunderstorm in anticipation for her arrival.
Teleportation: Black Hat can teleport herself and others in various ways, be it a lightning strike or engulfing her surroundings in darkness.
Technopathy: Black Hat can tamper with electronic devices at will, as depicted when a citizen who got in her manor by mistake attempted to take a picture of her.
She can also interact with the digital world, as she forcefully stuffed said citizen in there through her own cell phone, as well as crawling out of 5.0.5.'s computer after jumpscaring him.
Fiction Manipulation: She can warp any piece of media to his liking, seeing as when she set the Weeweenies on fire and merged a man and his horse together (inside a soap opera), leaving a black rose for a dame.
Enhanced Senses: Black Hat seems to be able to sense when someone addresses her directly, as she was shown hissing in the general direction of Demencia when she called him from as far as the upper atmosphere.
Transmutation: He's able to turn into dark mist and a mass of worms.
Summoning: Black Hat can summon people at will to her presence, often in painful and disturbing ways, as well as send them away. She's also able to summon a hellish steed for him to ride on.
Ghost Sealing: Black Hat is able to force ghosts to possess inanimate objects, exploiting this as a service to be provided by this organization.
Corrupting aura: People who stay in her presence long enough are driven to madness, and become her devout followers. It's unknown if this is a passive ability or if she chooses to do it.

Shapeshifting: Black Hat, on various occasions, changes his appearance in order to fool or torment others. The most notable example of this being when he changed herself into a perfect replica of 5.0.5. in order to terrify Demencia in "Wearing Evil".
Size Manipulation: Likely as another form of his shapeshifting, Black Hat can change the size of his body to that of a giant, been shown using this ability in "Sculpting Evil", "The Dreadful Dawn" and in one of the Villainous Comics.
Black Magic: As seen in "Ice Cream of Fear", he has some sort of proficiency in black magic, as she is able to bring back 5.0.5.'s ice cream to a seemingly normal state, while also giving it demonic qualities.
Laser Vision: In "Bad Security", Black Hat killed a blue jay by shooting deadly lasers out of her eyes. She also uses this ability to zap Dr. Flug in "The Lost Cases of Townsville".
Charisma/Manipulation: Black Hat, as a salesman, uses various forms of charisma and manipulation to convince other villains to buy his inventions.
Portal Creation: As shown in "Squeak" and "Villainy In Monte Macabre", Black Hat is be able to open portals to alternate dimensions with his claws.
Instrumentalism: As seen in "The Note of Destruction", Black Hat appears to be proficient in playing piano/organ.
Singing: She has the ability to proficiently sing. She also tends to make people go insane with his singing.
Fire Manipulation: Black Hat is able to manifest flames at will, incinerating one of Flug's airplane miniatures that she caught on her hand (in one of the Villainous Comics). During a fit of rage, she summoned red pillars of fire (and set his eyebrows ablaze as well) in "The Lost Cases of Boxmore".
Shadow Manipulation: As shown in "The Lost Cases of Elmore", Black Hat can teleport via her shadow. She also can transform his shadow into a cane.

Black Hat wears a black top hat with a red band as well as a rimless monocle on her left eye. She has dark grey skin, cyan fangs, and a forked tongue. She was also wearing a black trench coat with inner red lining, a light grey waistcoat, dark grey pants, a red dress shirt and a black tie. She has dark grey gloves, and occasionally summons a black walking stick that he forms from her shadow. Her shoes are black with white spats.Also she has long black voluminous hair and a beautiful gem in the middle of her tie.

Black Hat's existence is a mystery to Earth. It's unknown where she is from or how she was born.

Apparently, she is very old if judging by portraits and things in her mansion from ancient times of our era to the present. As evidenced by the fact that it was she who arranged the volcanic eruption in Pompeii and destroyed it.

The clothes she wears and his mansion are reminiscent of old English culture, including architecture, furniture and paintings. Dr. Flug suggests in his logbook that this era may be nostalgic to him.

At some point she started Black Hat Organization, as well as schools and camps for villains under her name.

Before Dr. Flug, she had a previous mad scientist that she vomited on and presumably killed.

Founder and Executive Director of Black Hat Organization
Leader of all villains of the Cartoon Network multiverse

Black Hat
Lady Black Hat
Mrs. Black Hat
Demon with the Black Hat
El Charro Negro

Wrathful businesswoman

Mass murder
Mundicide
Psychological and physical abuse
Stalking
Theft
Animal cruelty
Torture
Slavery
Pollution
Defilement
Aiding and abetting
Weapons dealing
Terrorism
Grand theft animarum
Mass property damage

Profit from selling his products to supervillains.
Help all villains of the Cartoon Network multiverse to get rid of all heroes (all ongoing, but most of the Cartoon Network villains have failed him).
Help every Cartoon Network villain get rid of all the heroes (presumably; ongoing).

Nigh-omnipotence
Nigh-omniscience
Nigh-omnipresence
Immortality
Shapeshifting
Exceptional charisma
Genius-level intelligence
Explosion manipulation
Cunning
Strategic intellect
Manipulation
Portal creation
Fire manipulation
Mastery in Intimidation
Musical talent
Umbrakinesis
Weather manipulation
Telekinesis
Laser vision
Shadow teleportation
Interdimensional travel
Shadow manipulation
Technology manipulation
Sharp teeth and claws
Enhanced senses
Ghost sealing
Superhuman strength
Portal creation
Dimensional travel
Pyrokinesis
Acidic vomit
Resistance to Toxins and Acid

Lady Black Hat is an enigmatic, sinister, intimidating, and manipulative individual who is very sadistic and takes pleasure in pure evil, even helping villains with plans to defeat the heroes. LadyBlack Hat also has a burning hatred for heroes, and if angry enough she does not hesitate to rage and torture. She especially gets very angry when any villain is defeated by the heroes, usually torturing these villains in addition to being irritated by Dr. Flug's failed experiments.

Black Hat appears to be a tall humanoid demon with dark gray skin, black sunken eyes, sharp pale green teeth and her left eye being covered by a monocle. Sometimes, when Black Hat is using one of her powers, said monocle will turn black and red, and start glowing. has been shown wearing only her formal attire, if the show progresses he might be shown wearing something else. He wears a black trench coat reaching down near the ankles, the collar of which is popped. Under that, she wears a red and gray undershirt, along with long gray pants as well as black and white dress shoes. She wears his iconic black top hat with a red band going around the bottom, and dark gray gloves and a black tie.

She is an demonic supervillain who is seemingly the embodiment of evil in every Cartoon Network media, by selling the dangerous weapons, traps, and other devices to Cartoon Network villains in their respective universes in hopes of them trying to accomplish with their schemes (although in reality, most of the Cartoon Network villains have actually failed him). She is the Boss of Dr. Flug, Demencia, and 5.0.5. whom he lives with and for the latter's to help along with her work.