One Piece, Beelzebub Recommendations
Tatsumi Oga is a delinquent and carries around a naked Demon Baby, whereas Luffy is a rookie pirate that's aiming to be the Pirate King. Sure... there's a large difference, but both are very comedic and there is action in both animes. :)
both the main characters are strong.
both the main characters are underestimated and after the fight people are surprised and have scarry look on thier faces.
both are Action,Comedy, Fantasy and Shounen.
both the main characters has a girl beside them
both the characters are not very friendly with others but when it comes to all they fight together.
both the main character luffy and Oga Tatsumi are simple-minded.
both of the main character don't care about fighting anyone even if its somebody very strong and don't think about what will happen next.
Lots of fights, action, and crazy humor in both series.
both have happy face while fighting.