Cardcaptor Sakura

One day, Kinomoto Sakura, a 4th grader stumbles upon the mysterious book of Clow. Upon opening it and reading the name of The Windy aloud, Sakura scatters the cards to the winds. Sakura is elected and appointed by Keroberos, Guardian of the Cards to capture the remaining cards. With her friend Tomoyo and rival Syaoran, Sakura begins an adventure that will forever change her.

Chobits

In the future, personal computers have developed into "Persocoms", mobile computers that look like human beings. Hideki Motosuwa, a prep school student, desperately wants to buy a Persocom but cannot afford to. One day he finds a Persocom that has been thrown away and decides to keep it. When he turns on the Persocom, all she can say is "Chii" so he decides to name her that. After a while it starts to become apparent that Chii is more than an average Persocom. Having much better performance, it seems that Chii might be a "Chobit", a type of advanced Persocom rumored to have independent thought. (Source: Anime News Network)

Magical DoReMi

Doremi Harukaze, 3rd grade student at Misora Elementary School, claims to be the world's unluckiest pretty girl. Fascinated by witchcraft, she is drawn into a mysterious shop where she meets Majo Rika and is able to deduce that this lady is in fact a real witch. Being exposed by a human triggers a curse that transforms witches into magical frogs. To regain her original body, Rika must turn Doremi into a witch by teaching her how to use magic. Thrilled by this odd development, Harukaze becomes a witch apprentice. Unfortunately, her two best friends, Hazuki Fujiwara and Aiko Senoo, discover that Doremi has become a magic user. Afraid that Harukaze might become a magical frog too, Majo Rika recruits both Hazuki and Aiko and makes them witch apprentices too. The trio has lots of adventures as they try to triumph the necessary trials to become real witches. (Source: Anime News Network)

Beyblade

Thirteen-year-old Tyson Granger (Takao Kinomiya), along with his fellow teammates, Kai Hiwatari, Max Tate (Max Mizuhura), and Ray Kon (Rei Kon), strive to become the greatest Beybladers in the world. With the technical help of the team's resident genius, Kenny (Kyouju), and with the powerful strength of their BitBeasts, the Bladebreakers armed with their tops (AKA: Blades) attempt to reach their goal. (Source: Anime News Network)

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.

Gundam Build Fighters

The story is set in the near future when GunPla Battles, competitions that pit Gundam plastic models against each other, have become popular worldwide in the "Second GunPla Boom." Sei Iori, a first-year middle-school student and the only son of a model shop owner, is talented at building GunPla, but inexperienced in the GunPla Battles. He encounters a mysterious boy named Reiji, who happens to be an accomplished Gundam Fighter. Together, they strive for the GunPla Battle world championships. (Source: Anime News Network)

Fantasista Doll

Uno Uzume, a girl who used to be an elite player at card tournaments, is one day given a curious device which uses special cards to summon artificially intelligent female warriors known as Fantasista Dolls. From this day on, Uzume spends each day spending time with her new friends, while also fighting battles against other card masters who seek to have their wishes granted in exchange for defeating her. (Adapted from: Wiki)

Rozen Maiden

Sakurada Jun spends his days online, ordering whatever he takes a liking to, only to return it before the payment is due. Due to psychological trauma from school, Jun generally keeps contact with people as little as possible. One day he finds instructions online that tell him to put his order into his desk drawer. Rubbing it off as a joke, Jun mindlessly does so only to find that his order instantly disappears from his drawer. A package suddenly appears, containing a beautiful antique doll. When wound up, this doll comes to life. Sadly for Jun, this doll Shinku views Jun as an equivalent for a servant. Despite the constant demands Jun now receives from Shinku, she slowly helps him overcome his fears of human contact as well as protect him from the deadly battles that come into his life due to her appearance.

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.