Agumon (アグモン)[67]Voiced by: Chika Sakamoto[10] (Japanese); Michael Lindsay/Tom Fahn[68] (Agumon), MJ Lallo/Philece Sampler/Brianne Siddall (Koromon), Doug Erholtz (Koromon, SkullGreymon), Michael Lindsay/Kyle Hebert (Greymon), Joseph Pilato/Kyle Hebert (MetalGreymon), Lex Lang/Kyle Hebert (WarGreymon), Peggy O'Neal (Botamon - Adventure Movie), Michael Sorich (Agumon - Adventure Movie), Bob Papenbrook (Greymon - Adventure Movie) (English)Agumon is a short-length Tyrannosaurus Rex-like Digimon who is Tai's partner. He is laid-back and simple-minded. Agumon always believes Tai has the best interests for the team and trusts him as a friend. His main attacks are flame-based.

• Botamon (ボタモン) is Agumon's Baby form, a botamochi-like Digimon covered in black fur.
• Koromon (コロモン) is Agumon's In-training form, a pink spherical Digimon with rabbit-like ears.
• Greymon (グレイモン, Gureimon) is Agumon's Champion form, a giant Dinosaur Digimon with a rhinoceros beetle-like helmet on his head.
• MetalGreymon (メタルグレイモン, Metarugureimon) is Agumon's Ultimate form, a cyborg Dinosaur Digimon with wings and missile hatches on his chest, and has a metal claw on his right arm.
  • MetalGreymon Alterous Mode is the upgraded version of MetalGreymon that only appears in the 2020 Adventure series. He is armed with an extra cannon on his left arm.
  • MetalGreymon (Virus) (メタルグレイモン (ウィルス種）, Metarugureimon (Wirusu Shu)) is a corrupted version of MetalGreymon, who first and only appeared in Digimon Adventure 02 when the Digimon Emperor tests his new Dark Spiral on Greymon.
• SkullGreymon (スカルグレイモン, Sukarugureimon) is Agumon's alternate Ultimate form, a Virus-type skeleton Dinosaur Digimon. SkullGreymon first appeared in Digimon Adventure, when Tai forces Greymon to Dark Digivolve in order to fight another Greymon by putting himself in harm's way. He appeared again in Digimon Adventure 02, when the Digimon Emperor took control of Greymon with one of his Dark Rings and forced him to take this form.
• WarGreymon (ウォーグレイモン, Wōgureimon) is Agumon's Mega form, a Dragon-Man Digimon with the powerful Dramon Killers equipped on his both arms.
• BlitzGreymon is Agumon's alternate Mega form, a bipedal mechanical red version of WarGreymon armed with plasma cannons. Only appears in the 2020 Adventure series where he fought and defeated MetallifeKuwagamon.
• Agumon (Bond of Bravery) (アグモン -勇気の絆-, Agumon -Yuki no Kizuna-) is Agumon's final form, a Digivolution forged by the bond between Agumon and Tai. This form only appears in Digimon Adventure: Last Evolution Kizuna during the final battle with Eosmon.[6