Gomamon (ゴマモン)Voiced by: Junko Takeuchi[10] (Japanese); R. Martin Klein, Michael Sorich (Zudomon, Vikemon) (English)Gomamon is a seal-like Digimon and Joe's partner. He has the ability to digivolve into seal-type forms with water-based attacks. Gomamon has a laid-back and easygoing personality, where he often attempts to convince Joe to overcome his fears and socialize instead of studying.

• Pichimon (ピチモン, Pitchmon) is Gomamon's Baby form, a microbe-like Digimon with a very small size.
• Bukamon (プカモン, Pukamon) is Gomamon's In-training form, a baby aquatic Dinosaur Digimon.
• Ikkakumon (イッカクモン) is Gomamon's Champion form, a walrus-like Digimon that can use his horn as a missile.
• Zudomon (ズドモン) is Gomamon's Ultimate form, a bipedal walrus-like Digimon with a turtle shell. He uses spark-based attacks with his Thor Hammer.
• Vikemon (ヴァイクモン, Vaikumon) is Gomamon's Mega form, a Beast Man Digimon with the appearance of a Viking walrus. He uses ice-based attacks with the morning star Mjölnir that carries on his back.