Fan Casting "My evil twin brother" in Crash The Bandicoot: N' Sane Origins

After Cortex's defeat, Aku Aku soon senses that there is something wrong in the fabric of time and space in the world around them. He then tells Crash and Coco the story about his evil twin Uka Uka, who he banished into an interdimensional prison long ago to keep the multiverse safe. Now, he has reason to believe he has been freed, but by who?