Lylatians are a human-sized race with furry characteristics originating from the planet Lylat. Their homeworld was once conquered by the Android race, but eventually they regained their freedom. There is little scientific information about their race.
Still, DNA tests have shown that Lylatians have a lot in common with Mobians and Humans, which has lead to speculation that Lylatians are a human/mobian hybrid. This is more supported by the fact that their race is relative young, but some scientists claim that this is just coincide.
The most supported theory is, that instead of creating one dominating race and eliminating other, two races merged together.
For more info see Three planet theory.