As there is no evolution of ToyAgumon in which he develops how Agumon I've started to make an evolutionary line with this idea starting with a Greymon : digimon
D-d-d-Digimon! Digimon Reviews!
Blackjack Rants: Digimon Reviews: Episode 1: Agumon and Friends
all about wargreymon
WarGreymon - Digimon Wiki - Neoseeker
gaioumon Instagram posts (photos and videos) - Picuki.com