我看到网上别的人这样回答的：My bro digivolved his Agumon into Geogreymon instead of normal Greymon, but that's fine... except Omnimon would have been cooler...Apparently you have to be a silver tamer and do that quest with a guy named Phil or something, to degenerate his Machindramon into Skullgreymon. There's more info on Gamefaqs. Hit...
