Digimon Data Squad

Fourteen-year-old street fighter Marcus meets a strange dinosaur-like creature. This strange creature, "Agumon", is a "Digital Monster" from the "Digital World". Marcus and Agumon agree to communicate by fighting. However, Agumon had escaped from and was being chased by an organization which investigates digital phenomena, "DATS". DATS attempts to recover Agumon from Marcus...

Marcus tries to hide Agumon from DATS in his house, but DATS quickly concludes that he is there, so they send Yoshi to investigate. Marcus's family comes into contact with Agumon, and they all quickly become friends, much to Marcus' annoyance. In the meantime, a Kunemon appears at Kristy's (Marcus's sister) school, takes over a young boy, and evolves to Flymon, forcing both Marcus and Yoshi to fight it.

A new member of DATS appears from Austria: Thomas H. Norstein, a fourteen-year-old genius who looks down on Marcus. Because of their different behavior, the two start to fight over everything. Meanwhile, several DemiMeramon appear in the city and the DATS members have to fight them. However, all the DemiMeramon fuse together to form Meramon.

Marcus and Thomas are ordered to work together, but they aren't able to do so, which becomes clear during the pursuit of a group of Numemon. Suddenly a Drimogemon appears and helps two burglars steal money. Marcus and Thomas try to capture it, but because of their quarreling, it escapes to the Digital World. To capture it, Thomas decides to follow it, even against the orders of Commander Sampson.

Marcus and Thomas, together with their Digimon partners, enter the Digital World to capture Drimogemon. They fall into a large underground labyrinth, Drimogemon's home, and escape seems impossible. Thanks to Marcus' unconventional methods, they manage to leave the labyrinth on Drimogemon's back, but then, the wild Digimon evolves to Digmon.

Although Agumon and Marcus work well together to defeat a Tortomon, Agumon gets angry at Marcus after a comment of his and now hides in his Digivice. Meanwhile, an Elecmon wreaks havoc in the city, causing car crashes. Marcus tries to defeat it alone, but Elecmon Digivolves to a black Garurumon, which even Sunflowmon and Gaogamon can't defeat. Marcus and Agumon must work together again to beat this new threat.

It's Kristy's birthday and Marcus must attend supplementary exams to save his grades. Unable to be by his sister's side on this day, he asks Thomas to take his place. A Citramon, however, threatens to ruin everything.

Yoshi is dating a famous musician, Neon Hanamura, who is also her childhood friend. The real reason for her to approach him is because he is suspected of hiding a Keramon who digivolves into Kurisarimon, and using it to bolster his career.

A famous boxer has a fantastic comeback after being absent for some years because of an injury. Thomas is a great fan of his, and when rumors of him using a Digimon to help him in his fights start to spread, he investigates, determined to prove his innocence.