Mobian

Mobians are the inhabitants of the planet Mobius from the various Sonic the Hedgehog continuities. They consist mainly of anthropomorphic animals.

Sonic the Hedgehog
In the cartoon series dubbed SatAM by fans, Mobians are the majority of Mobius' population. The only exceptions to this rule are Dr. Robotnik and his nephew Snively Kintobor.

Adventures of Sonic the Hedgehog
Similar to SatAM, Adventures of Sonic the Hedgehog features a world where the general populace are Mobians. However, humans feature regularly in the series in certain communities (eg Hill Top Village, Robotropolis).

Sonic Underground
Sonic Underground also depicts a Mobius inhabited principally by Mobians, although it should be noted that the variety displayed in them is much greater than in previous series. While there are the usual dogs, horses, etc. there are others that bear little resembelence to standard animals, having six arms, three legs, etc.

Sonic X
Unlike various other continuities, the anthropomorphs in Sonic X are not actually named as Mobians. However, due to the similarity between them and Mobians from other series, it is a logical assumption that they could be categorized as Mobians.

Archie Comics
The Archie Comics give an explanation as to the origins of Mobians. In the comics, Mobius is a futuristic Earth. After a human act of aggression towards an extraterrestrial emissary sometime in the year 20xx, the alien Xorda bombarded the planet with powerful gene bombs with the intention of eradicating all humanoid life on the planet. These explosives inadvertently created the Mobian Chaos Emeralds, and also caused the native animals of the planet to mutate and rapidly evolve, growing larger and more intelligent. However, it should be noted that the evolution of the Mobians may not have been entirely due to the Xorda. The aliens inform Sally that Mobians "contain a sizeable percentage of human DNA". It's possible that gene splicing may have been carried out beforehand. After all, Sally calls her race 'Mobo Sapiens.' Another possible result of the Xorda attack could have been the mutation that differentiates Overlanders from ordinary humans, both of which are found on Mobius.