Digimon Tamers (2001)

S1E1 Guilmon Comes Alive

Calumon is under attack from a Digimon and unexpectedly materializes in the human world. At the same time, a boy named Takato discovers an intriguing blue card. His fascination with the Digimon game inspires him to create his own Digimon. When he stumbles upon a Digivice, it replicates his creation’s data, resulting in a real digi-egg. That night, he dreams of a Digimon Tamer named Rika, and soon after, his digi-egg hatches. Takato is shocked to find his created Digimon, Guilmon, and is filled with apprehension about what might happen next.