Nightmares are common creatures that appear in the nighttime stages of Sonic Unleashed. These Dark Gaia Minions seem to resemble bipedal chameleons, having spiny backs and horns on their snouts.
Described as the lowest of the low, Nightmares are quintessential thugs among the Dark Gaia horde. Like all Dark Gaia creatures, they are capable of possessing people and drawing out negative emotions. The creatures themselves are driven solely by the instinct to hurt others.
Nightmares have elastic bodies and can stretch their limbs to a certain degree. They also possess basic combat tactics and are capable of dodging attacks or guarding against them. When attacking, they enlarge their arms to deliver more powerful blows.