The Fallen Country Of Reptilia.

Note: THIS IS NOT CANON. THIS IS JUST SOMETHING I CAME UP WITH.

Fanon History:

In the late 1980s the Mammalons had conquered the Reptilons with the help of the Avions. The reason why might me since there was an ongoing war with each other. The avions teamed up with the Mammalons and released a super weapon dubbed "the winged warrior" after the war, the Reptilons had been defeated, cussing their country to be taken over by the Mammalons. After that. The 2 remaining countries bordered themselves out. However, they had made exceptions. Specific animals, like bats, were kept in Mammalica, and if verified, you could visit the two countries. No matter your species. The only threat to them were the reptilians, which in the latest trailer, were kicked out of their own country and into a secret city. The aviators had their own city "Skyride City" to be with since they helped them win the war. The Winged Warrior, would later be resorted to a ocean house near Palm view.