Digimon Frontier

Digimon Frontier is an anime series that aired from 2002 to 2003 as the fourth series in the Digimon franchise.

The story follows five children who go to a subway station and take a train to the Digital World after being prompted to do so by unusual phone messages. There, they meet Bokomon and Neemon, who act as their guides and inform them that the world is under threat of being destroyed by the evil Cherubimon. However, hope is not lost as the children discover that they have inherited the power of the ten legendary warriors who saved the Digital World in the distant past, allowing them to transform themselves into Digimon. With their new powers, they fight Cherubimon and his forces to restore the fractured Digital World to its former glory.

Episode 1
Takuya Spirit Evolves into Agunimon.