Shadow bluey the fox, better known as Bluey, is a character that appears in the Boom the Echidna series. He is an anthropomorphic fox cub who, due to a genetic abnormality, was born with two distinct blue twin-tails, hence his nickname. Due to his abnormality, Bluey was a victim of bullying during his youth. One day, however, he met Sonic the Hedgehog and was Inspired to become as cool as him after seeing him run like the wind.