In Sonic Adventure and its enhanced port Sonic Adventure DX: Director's Cut, Perfect Chaos' entire body is composed of liquid, with no distinction between the different sections of his skin, and the spikes on his back are merely blunt bulges. The base of his snake-like body ends in a flood of liquid with several liquid-composed tentacles extending from him. Also, running from the base of his body to his back spikes and brain are massive green-glowing arteries.
He also has flaps of blue skin with scales hanging from just behind his eyes, green horns along his nose area and behind his eyes, and a fin-based bulge on top of his head that has his organic brain floating inside it. He also possesses a large mouth with green razor-sharp teeth and a green tongue that extends far beyond his eyes, which are green as well and have slit-like pupils. On the other hand, his underbelly is made of clear liquid energy, and he has pointy liquid spikes protruding from his back. His main body resembles a thick snake whose head, back and sides are covered in dark blue reptilian skin with scales. Vastly more different than any of Chaos' previous forms, Perfect Chaos is a gargantuan monster composed entirely of pure, water-like energy. Sonic & All-Stars Racing Transformed Review
