An akuma is a soul which has been brought back to life through sadness and despair with the powers of Millenium Earl. Their mission is to terrorize the earth and all who dwell within it. The Black Order is a group of Exorcists that have sworn to cleanse the souls of the akuma, and collect the substance known as "innocence". This powerful substance can be used as an anti-akuma weapon, and ultimately can help destroy the evil Millenium Earl. Allen Walker is a young Exorcist who has the ability to tell who is human and who is an akuma with the help of his cursed eye. Together with the Black Order, Allen must find all 109 pieces of innocence to protect the world and defeat Earl.
Two and a half years have passed since the end of Naruto’s old adventures. He has trained hard with Jiraiya-sama and has returned to Konoha to reunite with his friends; but Akatsuki, the organization that threatened Naruto years before, is on the move again and this time Naruto is not the only one in danger. With the powerful Akatsuki organization looming ahead of him, Sasuke still missing, and the struggle with the beast hidden inside him a continuous battle, will Naruto's hard-earned improvements be enough? Join Naruto, Sakura, new friends and the rest of the old gang as the action heats up with new techniques and stronger enemies.
Naruto Shippuden and D.Gray-man have many similarities. Primarily, their main characters are very similar. Both are cursed and contain great power, and are motivated to save lives. Each of them ends up on a great quest, which potentially has world altering significance. Both series also contain similar tones and humor.
I can, without hesitation, recommed D.Gray-man to watchers of Naruto Shippuden and vice versa.
Both of the anime's main character can see demons, unlike the other characters in the series. There is a lot of action, comedy, and adventures in both anime. So if you like one you'd like the other.
Ryo Takatsuki injured his right arm in an accident years ago. The resulting surgery brought about some unexpected, but not entirely unwelcome changes -- enhanced healing along with the presence of a superweapon dubbed "ARMS" in his body. But with all power comes a price, and with newfound allies who share his predicament, he must battle a secret organization trying to control the ARMS while trying to find the truth behind the weapon in his body for himself...
In both D.Gray-man and Project ARMS there is a group of youngsters with special abilities. Both groups become stronger as time passes by and they fight stronger opponents too. Their weapons also evolve. In both animes the antagonists were formerly normal humans, some became monsters by choice while others did not.
Samurai Champloo is all about style, from the dj-style scratching scene changes to the hip-hop-inspired soundtrack to the eclectic character design. Mugen's fighting style is a funky meld of capoeira and limb-cutting, and Jin is the dramatic foil; he is all steel and old-school samurai style. What binds them together is the desire to test each other's abilities, and a promise to a girl named Fuu: to find the samurai that smells of sunflowers, who plays a pivotal role in her past. Together they travel through edo-era Japan, finding battle and comedy wherever they stop.
Samurai Champloo and D.Gray-man aren't very similar, but both are dark; have comedic, emotional, and drama-filled scenes; and are about fighting. D.Gray-man is also about fighting a lot of demons, while in Samurai Champloo the main characters don't really have a special enemy. You'll probably like one if you liked the other.
The time has come for the next Shaman King to be crowned in the great Shaman Fight. Yoh Asakura is one such hopeful, a kind-hearted boy with a hidden power... and a terrible secret. Now, the fate of all mankinds rests in the hands of Yoh and his companions as they must battle the most powerful shaman who ever lived!
Apart from being two long animes that failed to give out a clear conclusion, Shaman King and D.Gray-Man resemble each other in many aspects. They are each a story of a boy on a long way to achieve a single, simple goal -- to keep the world as it is. The two protagonists, Allen and Yoh, are both aware of the existences of the powerful antagonists, Earl and Hao, who plan to destroy the world. To face them Allen and Yoh need more power -- and they do so by making friends, undergoing trainings, and experiencing more battles, all step by step. If you have watched either and liked the themes it presented, you might want to consider the other. If you liked Shaman King or D.Gray-Man simply for the lighthearted or dark atmosphere, this recommendation is not for you.