Its very difficult for a Pakistani to get an Indian Visa (and vice versa). The ones which are issued are generally diplomatic visas and visas to medical tourists. Those also require a formal request from the government of Pakistan to govt. of India. The only other way to visit the other country is if someone from that country sponsors you. Then too you can visit a restricted area (for eg. a city only). Also failing to report to a police station every time you move from one area to other can land you in trouble.