Digimon Story: Cyber Sleuth - Hacker's Memory

Synopsis

Keisuke Amazawa goes to the DigiMarket, where he remembers how he got his partners, Betamon, Tentomon, and Gotsumon. Not happy, he challenges the owners of the market and has to fight against their Triceramon, Tyrannomon, and Monochromon. (Source: Digimon Wiki)