BUR #6944 has been rejected.
create alias agnimon -> agunimon
I never heard it being called agnimon, but more importantly, if I search for Agnimon the first google result I get is Agunimon. (Agnimon: 69.400 Results; Agunimon: 209.000Results) Personally I would go for Agunimon, but I don't know what we would prefer here.
Further information
Agnimon (アグニモン)
Official romanization given by the Digimon Reference Book and used in most Japanese and some American English media.
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Agunimon (アグニモン)
Official romanization given by the official Japanese website for Digimon Fusion and used in most American English media and some Japanese media.
Updated