The Brain is a genetically altered mouse who has inspirations for world domination. He appears an anti hero
who allies with the heroes against Marceline's dad and the other villains
Greatest Strength: His intelligence
Greatest Weakness: He is sometimes unable to keep his temper check when Pinky does something stupid, which sometimes is the reason they fail
Best Friends: Pinky, Lizbeth and Maka
Worst Enemies: Snowball
The Brain is a white mouse with a wacked out tail, a red nose, pink ears, pink paws, and a white body..
The Brain is a very intelligent mouse with a lot of knowledge in his big fat cranium.
These traits make him calm and over-confident as he rarely loses his cool, even when his sidekick Pinky commits stupid things that ruins his plans. . However unlike most villains he is not truly evil and his main reason for world domination is help the world because he believes the world is full of stupid and cruel humans, and for the most part he's right. Brain, also despite his cynical attitude, does care for his friends particularly his 2 best friends.
He debuted here where he and Pinky somehow got to the future and were trying to get ACME labs back from Darkwarrior Duck. When they met Lizbeth who was looked around for clues and recruited him and Pinky to help her and her friends. She told Brain and Pinky were told about Darkwarrior's boss and they began helping the team with Brain's keen intelligence. Brain mainly interacted with Pinky, Lizbeth and Nibbler , Brain however goes through hell through not just Pinky, but also King Julian, Quackerjack and Zapp Brannigan. Like Pinky he offers to look after Starfire with Lizbeth and Axel while Bender is gone. While He, Lizbeth and Pinky leave they decided on an another person to do so.
Brain will be in Totally Mobian Spies with his friends Lizbeth, Pinky and Edd as he and Pinky like Lizbeth more than any member of the team. Brain works with Lizbeth and Pinky on a robot they recovered and finds out that Iron Queen is the supplier of the robots. Brain joins The B Team with Lizbeth and Pinky after learning some more detail on Iron Queen. Brain aids the group in Disney and helps Big Boss clear out Team Plasma and Guilty Spark's followers. The Brain works with Pericles to stop the plans against America and wonders how Pericles is not killing him despite Brain being a mouse and Pericles being a bird to him and is it seems Pericles was successful in finding an ailment. Brain believes sometimes why does he hit Pinky if Pinky never learns anything
Brain then tags along with Lizbeth and Nina to find Santa to prove to Pinky that Santa is nothing unusual. To get there he decides to use a hot air balloon since he used one in a take over the world plan. Brain doesn't care much for Christmas, but he stills celebrates it. Brain also likes difference over the same and he believes that people hate different.
The Brain returns here where he and Pinky join Dib and the others to fight two new villains Discord and Sigma. He starts out by being frustrated with Pinky and Julian being idiots. He also criticizes Brick and Butch for being idiots for dancing in the rain while he's working on how it's possible for chocolate rain to occur. Brain then has a discussion with Ada and the others over what insanity due to love can do. Brain then helps his friends frequently and at the later part he asks Lizbeth about the cause with 18 who provides the solution with help from Abadeer and Dr. Willy.
Meister of War
The Brain returns with Pinky to aid the heroes against the Animal Villains and Zeus. Before The Great Time Travel Adventure, The Brain had a rivalry with both Grubba and Carface. Now, in Meister of War, the three rivalry will fight each other.
He and Pinky pretends to join forces with The Murderistic League, but they were double agents for Lizbeth and the others.
The Legend of Maka Albarn
The Brain and Pinky return to help Lizbeth, Boomer and their friends against the villains and to help save Maka's life. These four are going to be the only four members of M.O.D.A.B to be appear. Brain and Maka interact extendly for the first time and they act very similar regarding Soul and Pinky as both of them annoy Maka and Brain to the point where they both bop them on the head with books or pencils yet they really care about them respectively
Allies: Pinky, Lizbeth, Dib, Bubbles, Bender, Milo, Edd, Peep, Darkwing Duck, Gosalyn, Marceline, Launchpad, Ice King, Finn, Django, Heloise, Emperor X, Noob, Hans, Luciaus and his gang, Scorpion, the V Team, Slade, Anti Cosmo, Jerry, Sam, Alex, Clover, Melida, Frost, Jazz Hands, Twilight Sparkle, Stan Smith, Sari Sumdac, Solid Snake, Mandark ,Q ,Phineas , Isabella ,Professor Pericles, Falco Lombardi, Ahsoka Tano, Sandy Cheeks, Big Boss, Meowth, Jack O' Lanturn, Meta Knight Pinkie Pie, Applejack ,Fluttershy, Rainbow Dash, Rarity, Asami Sato, Kirby, Tiff, Tuff, King Dedede, Escargoon, Dipper Pines, Mabel Pines, Profion, Master Chief, Cortana, Soldius Snake, Jill Valentine, Cammy, Zuko, Hellboy, Obi-Wan, Jack Sparrow, Atomic Betty, Sally Acorn, Jake Miller, Applebloom, Sweetie Pie, Swolattoo, Protoman, X5, Sparkley, Noah Parker, Hugo Brass, Professor Calamitous, Jimmy Neutron, Hiccup, Astrid, Katara, Danny Phantom, Tak, Raz, Crypto, R.J., Cassandra, Android 18, Sagat, Delta Squad, Megman X, Hiscord, Yakko, Wakko, Dot, John Price, Maka Albarn, Crona, Soul Eater Evans, Ragnaork, Knuckles Riso,
Enemies: Snowball, Marceline's dad, the Joker, Alt Doof, No Heart, Taurus Bulba, Eggman Nega, the Iron Queen, Discord, the Dystopia League, Sigma, the Sigma Organization, Ra's Al Ghul, the Umbrakinetic League, Katherine, Shinnok, Shinnok's Empire
While he seeks world domination, he may have abandoned it after the series only mentioning it for humor.
He is the first animal like pet to debut in the series
He and Pinky came into the story by time machine by following his archenemy Snowball
The Brain apparently knows a lot on Marceline's dad villains
Brain apparently snores every night
Brain has the honor of being the most honest politician in the Multi-Universe with his honesty to take over the world