Uni Uni

Uni-Uni (ウニウニ) is a green variety of Orbinaut that keeps the four spiked balls around it for defense. It appears in the Star Light Zone from Sonic the Hedgehog and can only be defeated while Sonic is invincible or time your hit very carefully (or when Sonic takes a hit, he has a quick moment to hit it when he's flashing). It also appears in Aquarium Park on the DS version of Sonic Colors and in Sonic the Hedgehog 4: Episode I. Like Unidus, Uni-Uni is named Orbinaut in the English version of Sonic the Hedgehog.