Pokémon

A young boy named Satoshi embarks on a journey to become a "Pokémon Master" with his first Pokémon, Pikachu. Joining him on his travels are Takeshi, a girl-obsessed Rock Pokemon Trainer, and Kasumi, a tomboyish Water Pokémon Trainer who may have a crush on him. Satoshi and Co. end up traveling through various regions, including Kanto, the Orange Islands, and Johto, and then enter the Pokémon League competitions there. Along the way, they run into many confrontations with Musashi, Kojirou, and Nyarth, a trio of Pokémon thieves who are apart of an evil organization called "Team Rocket". But everytime Team Rocket try to do their evil deeds, they fail thanks to Satoshi and his Pokémon. (Source: Anime News Network)

Digimon: Digital Monsters

Seven kids are transported to the Digital World, a strange place where digital creatures called "Digimon" reside. A group of Digimon soon befriend them and keep the kids out of harm's way. The children then discover they are the Chosen Children, which protect the Digital World from evil Digimon like Devimon and Vamdemon.

Bakugan Battle Brawlers

The Bakugan battle brawlers began when two young boys by the name of Dan and Shun made the rules to a mysterious game played with bakupearls, gate cards and ability cards. No one would ever have guessed what was going to happen next as Dan and his new internet friends battle their way to the bitter end.

Medabots

In the near future, humans and robots coexist. “Robattles,” a competition in which Medarot are pitted against each other, is popular among kids. A Medarot’s consciousness, effectively its brains, is located in a Medal that can be inserted into and ejected from the robot body. By chance, nine-year-old Ikki finds a Rare Medal, and soon after has his own Medarot named Metabee. This is the story of their friendship and growth as they use wisdom and courage to fight countless opponents in robot battles.

Yo-kai Watch

While going deeper into the woods one day, primary school student Keita Amano ('Nate' in the English localisation) notices a bizarre capsule toy machine who tells him to insert money which he obeyingly does. But after opening the capsule that came out, a ghostly creature named Whisper materialises. Whisper, who was sealed inside the capsule, rewards his liberator Keita by becoming his Yo-kai butler and gives him a Yo-kai Watch. Whoever wears the watch gains the ability to see supernatural creatures called Yo-kai, each type possessing different kinds of magical abilities, and which are normally invisible to humans. The Yo-kai Watch also allows the wearer to summon any Yo-kai they have befriended, enabling the wearer to make use of the Yo-kai's powers. Using it, Keita and Whisper encounter many mischievous Yo-kai around town, resolving the trouble they're causing and befriending many at the same time.

Monster Rancher

Genki is a boy who loves playing video games. One day he's zapped into the world of Monster Rancher and meets the girl Holly and the monsters Mochi, Suezo, Golem, Tiger and Hare. Together, they are searching for a way to revive the Phoenix, which is the only monster capable of stopping the evil Moo. (Source: Anime News Network)

Dinosaur King

Dr. Taylor was on a paleontology mission with his son, Max in Africa. Rex, Max's best friend, joins along as well. When Max had stumbled across some magic stone slabs with images of dinosaurs, the boys and their friend Zoe were being called out by the dinosaurs for help. It seems that an evil organization called the "Alpha Gang", led by the nefarious Dr. Z, traveled back in time to hunt down the dinosaurs so that they could take over the world by using those dinosaurs. It is up to Max, Rex, and their friend Zoe to travel around the world, defeating Dr. Z and the Alpha Gang while hunting down the dinosaurs. (Source: Wikipedia)

Monsuno: World Master

Chase Suno and his friends, Jinja and Bren, are on a search for Chase's father, Jeredy Suno. However, they soon become involved in something else upon reaching their father's lab and becoming involved with an organism known as Monsuno. Chase, choosing to side with his father's work, denies S.T.O.R.M. access to the Monsuno and escapes. They are now on the run from the military organization, S.T.O.R.M., while still looking for Chase's father. However, a mysterious organization also has his eyes set on Chase and the group's Monsuno. (Source: Animeultima)

Dragon Drive

Oozora Reiji isn't a lazy boy, he's just terribly unmotivated; all the clubs and activities he's joined don't interest him for long. That is, of course, until his best friend Yukino takes him to a underground arcade where an unbelievable virtual reality game is played - Dragon Drive - in which players fight each other with virtual dragons. Reiji ends up throwing all he's got into training a dragon so rare that the Dragon Drive staff are baffled. But soon Reiji learns that Dragon Drive isn't all it seems, and he might be the only one who can save an entire world from evil. (Source: Anime News Network)

Legendz: Tale of the Dragon Kings

When a crafty toy company "Wiz" also known in this show as Dark Wiz Company, finds crystals with the faint DNA of monsters known as "Legendz" are found and made into a battle game. A young boy named Shu receives one these crystals known as "soul figures" from his father after a baseball game. Legendz rapidly became popular and more and more children played it. Wiz employeys start to track down Shu for his special soul figure, for his soul figure can revive real legendz not just the little kiddy digital images! How will Shu fight his way to victory and claim this soul figure as his own? (Source: TV.com)

Shin Megami Tensei: Devil Children

Due to family circumstances, Setsuna Kai is moving to a new city where he's supposed to live by himself in an apartment. As soon as Setsuna arrives, he witnesses a mysterious rain of rocks and barely escapes being crushed by an enormous boulder. Setsuna's new home wasn't as lucky, being completely destroyed by another giant boulder. Setsuna is distraught, not knowing what to do when he's approached by a scientist named Hiromi Kaname. Dr. Kaname's equipment apparently can tell that Setsuna is a "Devil Child", and so Dr. Kaname decides to take Setsuna to his laboratory.

Bakegyamon

Sanshiro's chances of having an adventure are slim to none in his tiny island hometown, until the day a mysterious stranger invites him to play a game... Without warning, Sanshiro is taken to a backwards universe to play BakéGyamon--a game pitting monsters against monsters. Along the way he meets other players who have a particular reason for being there--to obtain the wish that is granted to the winner. (Source: VIZ media)

Flint the Time Detective

It is the 25th century. The dark lord has 'infected' history with time-devices that could damage history beyond repair. Flint and his father lived in the prehistorics when they got turned into fossils. They are discovered and Flint gets turned back to his original state. With the help of his father, a boy Tony and a girl Sara he has to travel through time to bring the time-devices back to the land of time so history will be saved. (Source: Anime News Network)

Puzzle & Dragon

The story is set in modern day Japan following the growth of the protagonist Taiga Akashi, an elementary school kid who wants to be a professional gamer someday. (Source: Crunchyroll)