Arbok

The large Pokemon, about 100 feet long. A large purple snake. He finds a girl, that he takes possive of. He likes to vore her, have her sit in his belly, however his acid never hurts her. So she is nice and safe. He loves his human more than anything. Sitting in a cage, he is sold to the human, and deciding, he becomes the girl's protector and maybe in time, more.