Rocky Balboa - When was his peak?

[Memphis]

Taking everything into account. Rocky 4 was his peak performance. Fresh off beating Clubber Lang he goes to Siberia to train (OK Montana or whatever it was) with nothing more than some rocks and a few lumps of wood. No sparring, no steps, no Apollo. And beats a rampaging roided up giant Russian who just killed his bezzy mate. And he had brain damage. He did have a truly great soundtrack to get the job done to though.

Edit: And he'd completely forgotten all of the defensive skills he learned one fight ago. Because of the brain damage no doubt. He basically let a whole country punch him in the face for 14 rounds and then poured it on late in the fight to beat 140 million people. Joe Gallagher would have been creaming his pants at those tactics.