|Debut||Digimon Accel: Justice Genome|
Frimon is a Lesser Digimon with a large neck frill on its neck. It is able to change the hardness of the fur on its frill, and by covering its body with the frill when danger approaches, it can be used as an "Armor" to protect its body. As its curiosity is extremely vigorous, it has a habit of responding to anything that moves, but because it also responds to its own tail, it chases after it, and is often observed spinning in place.
- Shippo Binta (シッポビンタ? lit. "Tail Whip"): Increases the centrifugal force in its long tail. This is so powerful that a clean hit will occassionally knock out even a Rookie Digimon.
- AncientGarurumon (フリモン)
Official romanization given by the Digimon Reference Book and used in the franchise.
- (En:) Frill.
Digimon Accel: Justice Genome
Frimon digivolves from Popomon after waiting about an hour. Frimon digivolves to Agumon X if it has between 0 to 5 Beast DNA data, 0 to 5 Insect-Plant DNA data, and 20 Dragon DNA data; to Biyomon if it has between 0 to 5 Insect-Plant DNA data, 11 to 15 Beast DNA data, and 20 Dragon DNA data; to Liollmon if it has between 0 to 5 Dragon DNA data, 0 to 5 Insect-Plant DNA data, and 20 Beast DNA data; to KoKabuterimon if it has between 0 to 5 Beast DNA data, 0 to 5 Dragon DNA data, and 20 Insect-Plant DNA data; to Patamon if it has between 0 to 5 Insect-Plant DNA data, 11 to 15 Dragon DNA data, and 20 Beast DNA data; or to Otamamon if it doesn't fulfill the requirements for any other Rookie Digimon.