Is "Rocky" (1976) left-handed?

In the famous boxing saga, Rocky Balboa, played by Sylvester Stallone, is sometimes portrayed as a left-handed boxer, which is used as a strategic element in some fights. However, the depiction is not consistent across all films in the series.

In the film "The Princess Bride" (1987), left-handedness is used as an element of surprise

There is a famous fencing scene in this film in which both the protagonist Westley (aka the Man in Black) and Inigo Montoya initially pretend to fence right-handed before both revealing that they are actually left-handed. This revelation serves as a surprising turning point in their duel.

Retraining is discussed in the film "The King's Speech (2010)"

This historical film, which tells the true story of King George VI. narrated, who stutters, shows how the king (played by Colin Firth) is forced to write with his right hand, even though he is naturally left-handed. It is suggested that such practices may contribute to his speech difficulties.