Rocky Balboa

Question: In Rocky V we learn that Rocky can't get licensed because of permanent brain damage. So how is it that, more than 15 years after the events of Rocky V, he is able to get licensed so easily?

Chosen answer: Stallone himself answered this question in an interview. "When Rocky was diagnosed with brain damage he never went for a second opinion and yielded to his wife's wishes to stop. So with the advent of new research techniques into brain damage, Rocky was found to be normal among fighters and he was suffering the results of a severe concussion. By today's standards Rocky Balboa would be given a clean bill of health for fighters.