He's a jungle wolf.

Jak is the son of a rich family. When Jak was a baby, his parents crash landed on a jungle, where they were killed by a Sand Tabby Lion. Jak cried really loud, untill he was raised by a group of Phantom Wolves. When he growed older, he stole a piece of cloth from a village and makes himself a loincloth after seeing people wearing clothes. He remained in the jungle untill Prentis found him.