How they changed AKU AKU the witch doctor mask and fatherly spirit to Crash and Coco Bandicoot

How they changed the look of AKU AKU the witch doctor mask and fatherly spirit to Crash and Coco Bandicoot. And trust me on this one, they changed his looks alot, and when I say a lot I really mean a lot!!! They changed his shape, how many feathers he has, the shape of his eyes,nose,mouth, and eyebrows, his invincibility music, what he sounds like when you let him out of a crate,what he sounds like if you get attacked by enemies, and lastly how he sounds like when he talks.