PrimitiveAgumon is an ancient form of Agumon. He is the partner of Matthew in Fan:Digimon Adventure: A Tale of Two Heroes and related fanfiction. PrimitiveAgumon wears the clothes of a stereotypical caveman and wields a large wooden club.
PrimitiveAgumon has the ability to armor digivolve through most Digi-Eggs, digivolve to Ultimate through a Crest, and DNA digivolve at his Champion and Mega stages.
On Matthew's tenth birthday, he played a game on his computer and noticed an ad for a website where he could create his own digimon. Matthew designed PrimitiveAgumon and Gennai helped the digimon sovereigns to create this digimon. Then a digi-egg came out of the computer. Matthew's friend Brittani came in at that time and two D-3 digivices shot into their hands. Soon after, the Digi-Egg hatched into AncientBotamon, PrimitiveAgumon's Fresh stage.
Throughout this fanfic, PrimitiveAgumon gains the ability to digivolve into more powerful forms. These forms are organized into a chart below.
|AncientBotamon||AncientKoromon||PrimitiveAgumon||PrehistoricGreymon||ArchaicGreymon Greyroumon||RelicGreymon MetalGreyroumon|
|DNA Ultimate||DNA Mega||X-Antibody||Super Ultimate|
|HakuGreymon||KaiserHakuGreymon||RelicGreymon X||RelicGreymon Burst Mode|
|Mode Change 1||Mode Change 2||Bancho|
|Draco Mode||Kitsune Mode||BanchoGreymon|
Pepper Breath- the same as Agumon's attack.
Agu Club- PrimitiveAgumon's club bursts into flames and is swung at the target.
Both Matthew and PrimitiveAgumon are left-handed.