■Agumon and Taichi Epic Evolution! Metalgreymon: Alteros Mode■
From the episode #21"The Tide-turning Update."
Taichi and Metalgreymon are trapped in a corner, struggling against the attacks of their powerful enemy Splashmon. At the moment of their greatest crisis, Metalgreymon updates, reacting to Taichi's courage to face the enemy! Metalgreymon: Alteros Mode made its first appearance!