Guardromon

An Android type, Guardromon is a protector by nature, a mechanical defense specialist who faithfully fights for justice. However, he tends to be rather foppish and frequently unlucky in his endeavors. His name is sometimes spelled as Gardromon.

Digimon Adventure:
Guardromon are shown in a flashback with a bunch of Mekanorimon. The Guardromon are led by the Dark Master Piedmon while raiding a building that the Digi-Eggs of the eight DigiDestined partner Digimon are held in, but a younger Gennai makes off with them.

Digimon Adventure 02:
Some Guardromon are under the control of the Digimon Emperor's Dark Rings in Full Metal City. One blows up the Digi-Port to the Real World before Kari Kamiya and Gatomon can make it through. Later on during this event, a Guardromon shoots down Nefertimon before Flamedramon and Pegasusmon deactivate them all. After Andromon successfully fights the control of the Dark Ring, he blows up the Control Spire, afterward reactivating and reprogramming the Guardromon. Guardian Angel One Guardromon is among the Digimon seen during the final battle against MaloMyotismon.

Digimon Tamers:
He helped the Tamers rescue Jeri Katou from Orochimon by conducting a plan of stowing away inside the drink barrels to get onto Orochimon's island undetected. After Orochimon was destroyed, Guardromon became a Digimon partner to who helped out in the battles with Beelzemon and the D-Reaper.

Digimon Savers:
A Guardromon was among the Digimon deleted by Akihiro Kurata's forces 10 years before the series.

Digimon Fusion:
An army of Guardromon serve AxeKnightmon in the Dust Zone as his contribution to the Bagra Army-Midnight combined effort to take out the Fusion Fighters.

(Source: Digimon Wiki)