Places on Earth-777 are kinda the same as on this Earth. With different names, and different structures, different Animals and nature.
North + South America -
Shadowmania (Crimson Shadows)
Europe + Asia -
Shadigona (Indigo Shadows)
Antarctica -
Shadrinala (Citrine Shadows)
Africa -
Shadowynix (Phoenix Shadows)
Australia -
Shadlucksia (Shamrock Shadows)
Each Type of Shadow can live anywhere. They're kind is just Originated there.