Pokota was born a human, but when he was an adolescent, the Durum sickness plagued Taforashia. The king, Pokota's father, became very ill. Rezo, the Red Priest, appeared and sealed the residents of Taforashia in sleeping chambers to isolate them until a cure was found. Rezo sealed Pokota's human body in a chamber, but he used a magical vase to transfer Pokota's spirit into his current form, an animal-like creature about 2 feet tall.
Near the end of Evolution R it is shown that Pokota is a stuffed animal after his ears are blown off revealing stuffing inside his ears. In the closing credits he is shown with a girl sewing new ears on. Because Shabranigdu took over Rezo who possessed Pokota's human body at the time, his human body was destroyed by Lina Inverse's Giga Slave. Thus, Pokota will never regain his human body.(Source: Kanzaka Dex)