wokuld the cinncinatti cobra beat the bronx bull? i believe that charles was a middleweight early in his carreer.
Charles would have toyed with him and MAYBE Jake's chin would let him go the distance, though I rather doubt it.
Ok, so here's what would happen... LaMotta comes out fast starts working the body, Charles doesn't back down and they start to trade, then a yeti falls through the ceiling, punches both of them in the solar plexus, gets tranked by wild-life control and dragged off to the San Francisco zoo, after which Charles KO's LaMattoa in about the 12th round. This is the most educated guess I can manage, keeping in mind both fighters styles, physical assets and in-ring mentalities.
Lamotta present virtually no problems for Charles, who gets an easy win here. In 10 rounds, Charles by decision wining basically every round, in 12-the same thing, anything past 12 and Lamotta gets stopped. The middleweight Charles of the two Charlie Burley fights very well could beat anybody in the history of 160lbs.
Charles beats Robinson as well at 160lbs. SRR has a puncher's chance, his speed, power, unmatched combination punching, footwork, and chin will make the fight competitive, but he'd be going against a naturally larger fighter who is a superior technician, possibly (likely) hits harder in a literal sense, is very accurate, and has the chin to take the majority of what Robinson could dish out. It'd be a battle, at least IMO, between the #1 fighter of all-time and a top 10 of all-time, with Charles' size advantage and superior technical prowess earning him the clear decision.
Charles at his prime didn't have problems with such primitive boxers as LaMotta, and was a much harder hitter than Robinson. Several rounds will be enough for him to beat LaMotta up enough to make him quit.
Charles was a "much harder hitter" than SRR at 160? I'm not convinced. Robinson hit damn hard at 160. Robinson is still one of the better hitters at 160 IMO.
Where does the question say 160 lbs? Besides, LaMotta was never a natural middleweight, he was a light heavyweight, same as Ezzard.