Yu-Gi-Oh! SEVENS

The seventh anime series in the Yu-Gi-Oh! franchise. The series takes place in the futuristic town of Gouha and stars Yuga Oudou, a fifth-grade, elementary school student, who loves both inventions and dueling. Feeling that the current rules of the Duel Monsters card game are too stifling, Yuuga successfully manages to install a new set of rules of his own creation known as "Rush Duel", allowing for more fast-paced and frantic dueling. The series follows Yuuga and his friends as they show off the delights of Rush Duels while under the watchful eye of the Gouha Corporation that oversees the city.(Source: Wikipedia)

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)

Duel Masters Victory

Duel Masters Victory is the 7th season of the Duel Masters anime series. It introduces a new protagonist named Katta Kirifuda, the brother of Shobu. He wants to be a dueling champion like his brother Shobu, but in his own way. The series shows the beginning of his dueling adventures with his friends, Bucchake, Yohdel and Benchan. During these adventures he considers Dragon Ryu a fierce duelist as his rival. This series also features the story behind the battle between the races of Hunters and Aliens. (Source: Duel Masters Wiki)