18 Underrated Shonen Anime You Should Check Out

Middle school student Tsunayoshi Sawada is weak, clumsy, and possesses no notable talents at all. Everybody sees him as a loser, including himself. He isn't exactly what most people would call mob boss material, but nevertheless, it's his job to become the next boss of the Vongola family.

To get him ready to take on the task, a "hitman" from the family is sent to help - and that hitman is actually a baby named Reborn. The training is brutal, but with help from Reborn, he might be able to surpass his limits. 

The Millenium Earl uses the souls of those who have passed away to power artificial beings called Akuma. To exorcise these souls and allow them to rest in peace, an organization called the Black Order uses anti-Akuma weapons called Innocence. Allen Walker, who has a cursed eye that allows him to see the souls inside the Akuma, works alongside his fellow exorcists to take down the Millenium Earl. 

In a world where whoever is named the Shaman King gets the power to reshape the universe to their liking, Yoh Asakura is one of the strongest contenders. Shamans can control spirits, but only the Shaman King is able to control the Great Spirit. Yoh hopes to be able to make life easier for himself and his fiance Anna - between Anna's difficult powers and Yoh's villainous twin brother Hao, they have a lot to contend with. 

Even though he's the son of a temple priest, middle school student Ushio Aotsuki doesn't have much interest in spiritual matters. But when he finds a youkai sealed in his basement demanding to be released, he suddenly has to care. At first, he refuses to remove the spear keeping Tora in place, but after yokai attack his town, he finds that he needs Tora's help. Thus begins the unusual and uneasy partnership between a powerful yokai and a reluctant human.

Fuko and Andy are two individuals with extremely peculiar abilities that somehow make them the perfect pair. Fuko is cursed with the ability to bring extremely bad luck to everyone around her, which has caused the deaths of many of her loved ones. On the other hand, Andy is immortal and is seeking any means to end his own life.

Together, they team up in the hopes of finding a solution to their problems. However, an organization lies in wait, hoping to exploit the two for their own nefarious plans.

The Law of Ueki follows a group of contestants seeking to earn the title of Celestial King. While plenty of anime echo this premise, this series is unique because of how bizarre everybody's powers are. There's a character who can turn garbage into trees. There's a character who can make another person become infatuated with glasses - but only if they perform a bizarre pose first.

These inventive powers are what makes this show stand out, but it's also just a solid action series that's worth your time even if you don't go for the weird stuff.