Submarimon

From the Digimon 02 series, he is a machine Digimon who is the result of when Armadillomon uses the Digimental of Faith (Realibilty).

Pre-Evolution

 * Fresh (Baby) - Tsubumon
 * Baby (In-Training) - Upamon
 * Child (Rookie) - Armadillomon

Attacks

 * Oxygen Homing (Oxygen Torpedo): the name says it all
 * Submarine Attack

Digimon 02
Armadillomon first became Submarimon on the day of the Digimental of Faith (Realiabilty) was found, when the Digidestined were trapped in a oil-refinery by a dark-spirled Mega Seadramon & had to send Iori Hida to get help. When Iori got back, his understanding of how his lie saved lives evoked the Digimental's power, allowing Armadillomon to Armour Digivolve into Submarimon, who destroys the Dark Spiral on Mega Seadramon. Since then, Submarimon was a valuable fighter during the Digimon Emperor's reign of terror.

But once Ken renounced his evil persona, Submarimon was no longer needed & appeared only a few times as Ankylomon was used more. But during the battle with MaloMyotismon, Submarimon was manifested as a result of Iori's dream for justice.