Ugly Cortexes are cut enemies from Crash Twinsanity. They were set to appear in Megalomaniac Mind Mania, a level which would have taken place in Cortex's mind. They were ugly, distorted versions of Cortex.
The Ugly Cortexes are missing large amounts of hair and they have pale skin and big, bloodshot eyes. It also appears that in one other concept, they have bolts in their heads.
They were set to appear in a cut level and they would attempt to destroy Crash, who had ventured into Cortex's mind to find the identity of the Evil Twins. According to one concept, one of these Ugly Cortexes would pursue Crash in a tank, leading to another yet chase scene.