A species is often defined as the largest group of organisms where two hybrids are capable of reproducing fertile offspring, typically using sexual reproduction. While in many cases this definition is adequate, the difficulty of defining species is known as the species problem.


Also called the Human race.

Sider Mecha

Artificials made from scratch of a Skeleton.


Robot Artificials made by Dr. Suka to destroy the Sider and Sider Mecha race.

Canine Race

A species that contains Dogs, Wolves and others.

Feline Race

A species that contails Cats, Tigers and others.

Kurtle Race

The race of mutant anthromorphic turtles without a shell.

Dragon Race

Part human at first but have hidden abilities as a actual dragon.