Chocobos, Moogles and Cids are merely tradition in the Final Fantasy series. Though there are theories that the Final Fantasy X universe eventually became the Final Fantasy VII universe, because
Shinra finds a way to harness the energy of the Farplane (Mako energy anyone?), and Final Fantasy VIII mentions Centra shelters (which were converted into the Gardens), and in Final Fantasy VII, Sephiroth mention that some of the ancient race of the
Cetra gave up their nomadic lifestyle and build
shelters!
Hmmm...
