If you're looking for manga similar to Beelzebub, you might like these titles. All recommendations are made by Anime-Planet users like you!
Ichigo Kurosaki is an average high school boy with a not-so-average ability to see spirits - something that hadn't affected his life much until a strange woman entered his room one day. Named Kuchiki Rukia, she's a shinigami who was sent from the spirit world to destroy a hollow - a dead-soul-turned-monster; and much to her surprise, Ichigo can see her. When the hollow suddenly attacks his family, Rukia intervenes and is injured in the process, leaving Ichigo to fight it himself. But when Rukia lends him her shinigami powers - which is forbidden - he inadvertently drains them away and has no way to return them. Now, Ichigo is a full-fledged shinigami who must juggle his studies with his newfound duty of fighting hollows; but having gained his powers through forbidden means, the spirit world isn't going to leave Ichigo alone. Ichigo and Rukia must keep their situation a secret from the other shinigami, or the consequences could be dire.
Both of these are shounen titles that deal with badass teenage main characters who end up being a part of another world at times. If you like Oda or Ichigo then read the other manga. Those two have a lot in common and tend to not talk things out, but instead let their fists do the talking.
Yuusuke is a street-fighting, class-skipping juvenile delinquent. Killed in an unexpected act of kindness, he thwarts the spirit-world bureaucracy and ends up with a second chance at life... as infant prince of death Koenma's Spirit Detective! Simultaneously cheered on and kept in line by Keiko Yukimura, his childhood friend, he is joined by a spiritually aware human, two demons on parole, and guided by a much too lively ferry girl of the dead. Together they plow through demons, tournaments, hijinks, intense "martial arts" training, cross-dressers, dungeons, conspiracies and bad puns alike. At the end of the day, what's it all for? Kicking butt and saving the world, of course!
Both Beelzebub and Yu Yu Hakusho follow a delinquent teenage boy who is the toughest kid at school. Through different events both protagonists becomes involved with the demon world, and they each aquire some powers. These two are about as similar as two titles can get. They are each totally unique, and if you liked one, you would for sure like the other.
Rin Okumura is a seemingly ordinary boy living at the Southern Cross Boy’s Monastery. One day, however, Rin encounters a boy who has been possessed by a demon. Amidst the struggle, he not only awakens latent powers sealed within him, but also learns that he is the son of Satan! No longer able to stay under the protection of the church and with his very existence straddling the line between human and demon, Rin decides to fight against his parentage and joins the True Cross Order as an exorcist. Now, the teen must attend the True Cross Academy and begin special exorcist training alongside his new comrades all while keeping his identity a secret; but can the son of Satan really become a true exorcist?
Both of these manga feature the devil as well as other both good and bad demons. Both main characters like to do everything themselves and can't really understand (at least not at first) how to work along with friends. Both protagonists also carry a heavy burden and incredible power that they have to learn to control in order to save the world or just survive. Both manga feature humor as well as tragedy and pain but Beelzebub leans more toward humor while Ao no exorcist is a bit more serious.
As an added bonus, both also take place in a school setting and are well written and drawn and there are lots of memorable characters.