Some Sonic characters, like Mephiles and Tails Doll, have eerie designs that can be terrifying to encounter. Dark Gaia, Metal Sonic, and Black Doom have ominous appearances and powers that make ...

Similar to Chaos (fitting, too, since this game was called Sonic World Adventure in Japan), Unleashed's Dark Gaia is a big, scary presence that's related to the chaos emeralds, coming out every ...