The power of extremely heightened and enhanced intelligence and other mental abilities/skills. Sub-power of Enhanced Condition.
The user has intelligence that is significantly above standard genius level intellect; possessing exceptional intellectual capabilities, mental capacity and concentration, mental calculations, memorization, perception, deduction, analyzation, cognition and competence, expertise and knowledge, reading skills, learning capacity, thought process, creativity, originality, etc., typically to a degree that is associated with the achievement of new advances in a domain of knowledge.
Galvans like Grey Matter (Ben 10) are naturally extremely intelligent, and can understand and operate virtually any machine, even if they've never seen it before. Their intelligence also allows them to understand intricate codes and languages.
Brainiac (DC) truly lives up to his name..
Egg Fu (DC Comics)
Lex Luthor (DC Comics) is one of the greatest intellectuals in the DC Universe, achieving such feats as solving the Anti-Life Equation.
Egghead (DC Comics) is stated to be the second smartest crimmal mind in the world.
Dexter (Dexter's Laboratory) is a boy with an inhumanly high intellect allowing him to build vastly advanced technology
Stewie Griffin (Family Guy) is inhumanly genius, especially for being a one-year old, talking like an adult and creating vast amounts of powerful weapons and other inventions.
Ford Pines (Gravity Falls) has six fingers, genius intellect, and extensive knowledge of the supernatural.
Iron Man (Marvel)
Dr. Banner (Marvel)
Reed Richards (Marvel)
Dr. Doom (Marvel)
The Leader (Marvel)
Mad Thinker (Marvel)
Amadeus Cho (Marvel)
Maximus The Mad's (Marvel) genius is rivaled only by his insanity.
Tech E. Coyote (Loonatics Unleashed)
As his name implies, Brain (Pinky and The Brain) is highly intelligent
Rick Sanchez and Zeep Zanflorp (right-far right) (Rick and Morty) are the most brilliant minds in their respective universes.
Peridot and Pearl (middle-right) (Steven Universe) have intimate knowledge of science and technology.
Blossom (The Powerpuff Girls)
Mojo Jojo (The Powerpuff Girls)
Hunter Rose, the first Grendel, has enhanced intelligence thanks to a brain mutation.
Cadpig (101 Dalmatians) is unusually intelligent for her age, being able to speak in "metaphysical metaphors" and displaying an extensive knowledge of (fictional) tribes and cultures.
Sosuke Aizen (Bleach) is one of the most brilliant geniuses of Soul Society.
Dr. Gero (Dragon Ball)
Hotaru Imai (Gakuen Alice) with her Invention Alice
The most intelligent of all the Chess Pieces, Peta (Marchen Awakens Romance) is in charge of advising the plans for the army.
Shiro (No Game No Life) has genius-level intellect, she can speaks 18 languages, and learned to read Imanity in 15 minutes.
While not as intelligent as Shiro, Sora (No Game No Life) is shown to have a brilliant IQ.
Jibril (No Game No Life) live for six millennia, therefore, her knowlege is outstanding when compared to others.
Ami Mizuno (Sailor Moon) possesses an IQ of 300.
Despite being an infant, Vino (Zatch Bell!) possesses great intelligence allowing him to speak in complete sentences and read his mamodo, Clear Note's spells.
With an IQ of over 180, Zatch's bookkeeper, Kiyo (left) (Zatch Bell!) has used his intellect to their advantage by devising tactics and strategies to help them win many battles, often grasping the purpose of new spells in the middle of a fight.
Master Yao (Legends of Awesomeness) is a legendary kung fu master renowned by many for his outstanding intellect; among his admirers is Shifu, who idolizes him and once commented on Yao being "the greatest kung fu mind this world has ever known".
Sheldon (Splatoon) describes himself as has an above-average intellect, which helps when it comes to creating weapons based on his late "Grandpappy's" blueprints.
Ryder's intellect (PAW Patrol) has allowed him to create various gadgets for the PAW Patrol
Viras (Gamera vs Viras) possesses an IQ of 2500
Despite their feral appearance, Mirelurks (Fallout) are highly intelligent.
Olympia Brightly (Norm of the North) is a pre-teen genius, she was able to figure out Norm was a real polar bear and suggested tips on how to destroy Mr. Greene's business.
At only four years old, Lisa Loud (The Loud House) is a scientific genius.
Dr. Brigid Tenenbaum (Bioshock series) uses her love for science and knowledge of genetics to make up for past sins.