Evil Coco is Coco's 10th dimension self. She is a deleted character from Crash Twinsanity. Not much is known about her except that she isn't that smart, is flirtatous, and may or may not be Evil Crash's sister. However, Evil Coco may also refer to a hypnotized version of Coco that appears on Crash Bandicoot 2: N-Tranced who fights Crash on his second boss fight, but she has her normal appearance there. Her official appearance was only in one of Crash Twinsanity's deleted scenes, where Crash, Cortex and Nina meet her at the 10th Dimension. She does not attack the Crash team and never acts as an enemy in any sort. Compared to her other dimension counterpart, she has a pink nose, brown fur, different clothes, black hair, fangs, and purple eyes.
She was to be the exact opposite of the original Coco: flirtatious, dumb, and goth-like. That would make Evil Crash the smart sibling, in contrast to the original Crash. Although she was meant to be a villainous counterpart, the only cutscene made with her shows them friendly towards the evil Cortex (who was also supposed to have a 10th dimensional Good Cortex).