[@Altered Tundra] Since there's been no response/no other way to contact. I'd like to go with this line. Muchomon - Diatrymon - Yatagaramon - Kuzuhamon.

The color scheme works for the first two. He's a bird primilary. And the mega matches the color scheme of the ultimate, and Mega's being humanoid forms aren't uncommon in the first season or generally. (And all of them are connections on the website you mentioned.)

So since both of my lines are being considered to be used by one person. I'd like to claim one so I can keep at least one of my original options.