Terriermon is the partner of Kouda Montoya. Unlike his cold and moody tamer, Terriermon is very kind and caring, but also very loyal to him.
- Terrier Tornado: Generates a tiny tornado by spinning its ears like a propeller.
- Bunny Blast: Spits out shots of superheated air.
The name "Terriermon" refers to only the Rookie form of this Digimon. However, the Rookie form remains as the most common and preferred form, due to the amount of energy required to stay in a higher form.
Terriermon's Baby form. His only appearance in this form was when the Digimon were waiting for their partners to come to the Digital World.
Terriermon's In-Training form. He first appears in this form when his lost so much power from Rapidmon. He also sometimes appear whenever he was forced to degenerate from Rapidmon or MegaGargomon. His attack is Double Bubble.
Terriermon's Champion form. He first appears in this form when he tries to protect the DigiDestined from an angry Boarmon. Gargomon is usually a happy Digimon, but be careful, when he gets angry, he goes into a shooting rampage. His attacks are Gargo Pellets and Bunny Pummel.
Terriermon's Ultimate form, when he digivolve from Gargomon to fight Riku Timura and his Coronamon. He is a very fast rabbit. He is sometimes forced to degenerate to Gummymon. His attacks are Rapid Fire and Tri-Beam.
Terriermon's Mega form. After Kouda learns the true meaning of friendship, his heart glows, causing Terriermon to warp digivolve to MegaGargomon. MegaGargomon then destroys one of Daemon's army. MegaGargomon is a Godzilla sized rabbit robot. Sometimes, like Rapidmon, he is forced to degenerate to Gummymon. His attacks are Gargo Missle and Mega Barage.