He is voiced by Skip Stellrecht also voices Might Guy in the English Version.
He resembles a small akita inu pup armed with boxing gloves.
Gaomon is a very calm and quiet; in his first appearance in the Japanese version, his only dialogue consisted of answering "Yes master!" or "Sir yes sir" (in English) to Thomas's orders. He was given more dialogue in later episodes.
As seen in "The Norstein Family Secret" and "A Birthday Kristy Will Never Forget", he is shown to blush in the presence of little girls that remark on how cute he looks like a real puppy.
When DemiMeramon spawned from original's flame sparks are attacking the city. Sent by Commander Sampson to battle the DemiMeramon, Thomas has his partner Gaomon digivolve into Gaogamon to defeat them. However, three DemiMeramon remain at a chemical plant close to DATS. Starting to suffer self doubt after seeing Thomas and Gaomon fight.
Marcus and Thomas, together with their Digimon partners, enter the Digital World to capture Drimogemon. They fall into a large underground labyrinth, Drimogemon's home, and escape seems impossible. Thanks to Marcus' unconventional methods, they manage to leave the labyrinth on Drimogemon's back, but then, the wild Digimon digivolve to Digmon.
An Elecmon wreaks havoc in the city, causing car crashes. Marcus tries to defeat him alone, but Elecmon Digivolves to a black Garurumon, which even Sunflowmon and Gaogamon can't defeat.
DATS authorizes Yoshi, Thomas, and Marcus to be dispatched into the Digital World. Unfortunately, their presence does not go unnoticed by Merukimon and a mysterious shadow, who quickly ambushes the DATS after their arrival. The attacker turns out to be a ten-year-old boy named Keenan Crier, who harbors an intense hatred for humans.
Dokugumon, the spider Digimon quickly trap the DATS and their partner Digimon, dragging them all into the depths below where their lord MetalPhantomon dwells. He casts the DATS into a world of endless nightmares and despair where their greatest fears take shape. After reliving a painful memory about his mother, Thomas' DNA awakens, granting Gaomon the power to digivolve into his Ultimate form, MachGaogamon.
Without warning, the spider Digimon quickly trap the DATS and their partner Digimon, dragging them all into the depths below where their lord MetalPhantomon dwells.
With Yushima's help, Marcus, Keenan, and the others are able to return to the real world. However, they are forced to leave Yushima behind in the Digital World.
- "Sir yes sir"
- "Yes master!"
- "Gaomon Wrap Digivolve to..."
- "Gaomon Double Warp Digivolve to..."