Just like most characters in the manga, they are based on the playable characters in the game, he is based on Hilbert. Though unlike in the game, his hair is shown once, which is messy without the hat.
Black is a Pokémon Trainer aspiring to be a Master Trainer, beat the Elite Four and become Champion. He is also clever, as he uses his Pokémon in different ways to help with tasks. He is described also to be 'hot-blooded' because of his loud nature and tendency to do difficult tasks by himself. Black does not understand the meanings of show business like White, as many different aspects of show business surprise him. Black is also familiar with libraries, going there a lot as a child. Also because of Black having many dreams, he cannot exactly think straight. To prevent this from happening often he has his Munna eat them, which he refers to as 'darkening' his 'blank' (in other words, clouded) mind. This allows him to think much clearer in thought and become much smarter in tasks. When he does this, he apparently see everything in his perception in hexagons.
Black & White Chapter
Black is a Pokémon Trainer who dreams of conquering the Pokémon League, he also screams it most of the time. Because of these dreams, he can't keep focus on the real world, so he has his Munna use Dream Eater on him to "blank his black mind" which causes him to sense things others can't just like finding the real culprit that in which Black was also accused of messing with White's Xtransceiver commercial, but found the real culprit: a Galvantula, he uses Tep but got most of their equipment burned but he captured it. He also joined the Pokémon BW Agency under President White because he owes White a lot of money because White payed for the equipment in which his Tep burned makes him no other choice but to join her. In Accumula Town, he get's angry at Team Plasma because some people released their Pokémon because of Team Plasma's speech, even Pokémon some people have kept for at least a very long time. He runs towards into finding Team Plasma.
As the story goes on, he starts to call White "boss" because of he being her employee. Black also encounters N and had a match against him which ended in a draw because both of their Pokémon fainted. Though Black stated that N was probably a good guy even though in Team Plasma because his Munna read N's thoughts and it was safe to say that he was a good person. He later met Bianca and Cheren in Striaton City to team up on a three-on-three battle or a Triple Battle. The battle starts out rough but finally manage to win by knocking out Chili's Pansear. Black's Munna runs away after being attracted to eating a strong dream. Black goes after Musha to find out Team Plasma has captured Musha. He fights Team Plasma off and saves Musha.
Once he arrives in Nacrene City, he gets swayed into helping White shoot a video. But a Scraggy and Scrafty steal a prop for the scene and have to be knocked down. Black then leaves for his Gym battle, running through the puzzle quickly. The Gym battle is ended in a double knockout but Lenora gives her badge up anyway. White then tells him that they should head to Nimbasa to get her Musical project done. But Team Plasma steals the dragon fossil in the museum and Black sets out with Burgh to find it. They then get attacked by the fossil but are able to find the Cofagrigus controlling it and knock it down.
After the fossil is returned, Black and White are attacked by Virizion but don't know what it was. They meet Battle Company President Geoff who suggests it was Virizion. When they arrive in Castelia City, Black finds a lost boy and tells Tep to watch the boy while he gets the authorities. But the boy is a Zorua and attacks Tep. When Black returns, the Zorua escapes and he has no idea what happened. When he meets up with White, Tep goes on the verge of evolving. Black then leaves for his gym battle. In the battle, Tep evolves into Pignite and is renamed Nite. Then they hear about the Pokémon kidnappings. The discover that Team Plasma are the culprits and are defeated. Black and White come to Liberty Garden to find Victini under Team Plasma's custody. Black defeats them and frees Victini.
Black later meets Grimsley who plays a game with him. They then discover a Team Plasma grunt trying to get to the Relic Castle. Black and White come to Nimbasa and start working on the Musical project after they launch the opening ceremony, Black fights his gym battle stuck on a roller coaster but wins using the vertical wheel of the coaster and meets Thundurus. Black returns to find White then sees Marshal carrying her unconscious, thinking he attacked her. Marshal then tells Black to take her to the hospital to recover, and Black does so. After White has regained consciousness, she tells Black the story of her and N in the ferris wheel and Gigi going with him and not her. He then tries to coach White how to catch Pokémon when he captures a Tirtouga. He lends her his Brav for the Battle Subway and they go their separate ways.
Black 2 & White 2 Chapter
"I've made up my mind!! I'll catch up and and stop those guys from making any more speeches!"
Bo was given to Black by Prof. Juniper and previously named Tep. In battle, he is a powerful Pokemon who likes to search for items using its Fire-type moves. He also has quick reflexes, strong defense, and is able to keep up with its partner. He evolved into a Pignite during the Castelia City Gym Battle. After the battle, Black changed his nickname to "Nite" due to his evolution. His nickname was changed again to "Bo" after it evolved into an Emboar.
Brav was Black's second Pokémon and is his strongest Pokemon. Brav was originally a Rufflet that attacked Bianca after she stepped on it. Black caught the Rufflet and named it Brav. It evolved sometime before Black was introduced in the manga. Brav is a powerful flier that is able to lift its trainer into the sky with ease. He was in White's possession as she took part in the Battle Subway but after she developed her own Pokemon team, Brav was given back to Black.
Musha was Black's very first Pokemon. Black first met Musha when he was five years old. Black's dream of winning the Pokemon League was so strong, Musha bit down on his head to eat his dream but the dream remained. After a battle with N, Musha was revealed to have only followed Black's orders because his dreams tasted good to him and kept him fed. After the taste of Black's dreams changed over the course of his adventure to Musha's distaste, Musha decides to leave Black. He returns later.
Black caught Tula when he was messing with White's Xtransciever commerical. Tula was revealed to have been released by its former trainer whom was swayed by one of Ghetsis's speeches. In the round "Listening to Pokemon," he officially became one of Black's Team Members. Sometime before the round "Battle at the Dreamyard," he was officially named Tula.
Black is revealed to have obtained Costa in Nimbasa City when he showed White how to capture Pokemon. Marshal had released it earlier due to not being able to listen to any of his commands. Costa is a stubborn Pokemon who dosen't listen to Black's commands.