Harry Potter Fluffy origin makes sense in the universe of the Harry Potter novels, but the movies modify it and make it illogical.
In adapting the Harry Potter novels for the big screen, several of the book’s particulars have been altered, notably the account of Fluffy’s beginnings, which went from being reasonable to gibberish. The wizarding world of Harry Potter is home to a wide variety of fantastic beasts.
Fluffy, however, is one of its most stunning features, and Harry Potter and the Sorcerer’s Stone is the book in which he is seen for the first and final time. The Sorcerer’s Stone is kept safe by Fluffy, a monstrous canine with three separate heads.
It is when Harry, Ron, and Hermione are trying to evade Argus Filch, the custodian of Hogwarts, that they first see him. At the moment, he is stationed on the third level of Hogwarts, watching over a trapdoor.
According to what’s said in the book, Hagrid acquired the amazing beast known as Fluffy from a “Greek chappie” at the Leaky Cauldron tavern. It makes perfect sense for fluffy to have originated in Greece. In point of fact, it is a reference to the frequent appearance of dogs with three heads in Greek mythology.
In addition, The Sorcerer’s Stone links Fluffy to Cerberus, maybe the most well-known three-headed dog in literature, by demonstrating that Fluffy originated in Greece. This leads to the inference that Fluffy is either Cerberus or a descendent of Cerberus.
In contrast, Hagrid makes it very apparent that he obtained Fluffy from an “Irish feller” in the film adaptation; hence, the whole allusion is gone, and Fluffy’s very origin becomes devoid of any significance.
Why the Origin of Fluffy Being Changed Is a Detriment to Harry Potter’s Mythology

It is not the first time that the Harry Potter films have omitted book sequences or characters; for example, some aspects of the trio’s encounter with Fluffy and their passage through the trapdoor were also retold in a different manner in the book version of The Sorcerer’s Stone.
There is no unanimous agreement about the reasoning for the implementation of this change. Screenwriter Steve Cloves said that he had placed “Greek chappie” in the screenplay at one point, but he is unsure as to why the phrase was rewritten for the film adaptation of Harry Potter and the Sorcerer’s Stone.
The fact that the origin of the three-headed dog has been changed, however, is particularly detrimental to Harry Potter’s mythos. The series has made references to preexisting mythology on several occasions, not just once in the story of Fluffy.
In point of fact, both the novels and the movies have drawn several times from Greek, Roman, Celtic, and Anglo-Saxon mythology. Furthermore, roots such as Fluffy in “The Sorcerer’s Stone” contribute to giving the world its own hue.
The fact that viewers can relate some aspects of the Harry Potter series to other tales they are familiar with and like, such as Greek mythology, is a significant part of the magic that surrounds the franchise. It maintains the franchise’s feeling of stability in the familiar while still providing a sense of fun.
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After The Philosopher’s Stone, what happened to Fluffy?

After the events of Harry Potter and the Sorcerer’s Stone, Fluffy is never seen or heard from again in any of the Harry Potter media, including books or films. J.K. Rowling has provided some clarifications, despite the fact that Harry Potter’s tale in the canon world does not answer any of the problems that have been raised.
After the Sorcerer’s Stone was destroyed and Fluffy’s job as its defender was no longer required, Hagrid released the three-headed dog into the Forbidden Forest so that it might live its life in peace. After Dumbledore arranged for Fluffy’s return trip to Greece, the next thing that occurred to Fluffy was that he went back to his home nation of Greece.
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