In the book, Hagrid said he "bought him off a Greek chappie I met in the pub las' year." The seller's nationality is, of course, a nod to Cerberus being from Greek mythology. For some reason, Hagrid's line was changed in the movie, replacing "Greek chappie" with "Irish fellow" and thus cutting the book's mythological in-joke.
It has three heads (if you mean Fluffy).
The three-headed dog was called Fluffy. Although it was featured in Harry Potter and the Philosopher's Stone rather than Chamber of Secrets.
Hagrid's hellhound, Fluffy, is an allusion to the Greek guardian hellhound Cerberus, who guarded the Underworld, as Fluffy guarded the Sorcerer's Stone.
Rubeus Hagrid.
There are two dogs introduced in Harry Potter and the Philosopher's Stone.Fluffy is the three-headed dog guarding the trapdoor on the third floor corridor, and Fang is Hagrid's pet dog.
Harry got past Fluffy by playing his flute that Hagrid got him for christmas to put Fluffy to sleep. In the movie they do not show this.
Rubeus Hagrid's dog is called Fang.In Harry Potter and the Philosopher's Stone Hagrid also owns a three-headed dog called Fluffy.
Fluffy, Hagrid's dog (who appears in Philosopher's Stone,not Chamber of Secrets), who he got off a "Greek chappie" in a pub.
Rubeus Hagrid's dog is called Fang. He also briefly had a three-headed dog called Fluffy.
It has three heads (if you mean Fluffy).
Rubeus Hagrid received the dragons egg from an unknown man in the Hog Head, a pub in Hogsmeade. The man was Professor Quirrell who was trying to get information on how to get past Fluffy and knew that Hagrid really wanted a dragon.
The three-headed dog was called Fluffy. Although it was featured in Harry Potter and the Philosopher's Stone rather than Chamber of Secrets.
Hagrid's hellhound, Fluffy, is an allusion to the Greek guardian hellhound Cerberus, who guarded the Underworld, as Fluffy guarded the Sorcerer's Stone.
Actually, it's not Harry's dog, but Hagrid's, and the dog has three heads.... Need more of an answer?
Fluffy, a three-headed dog belonging to Rubeus Hagrid who guarded the Philosopher's Stone.
Harry's pet was named Hedwig. It was a Snowy Owl.
Harry, Ron and Hermione are having tea with Hagrid. Ron tells Harry that Severus Snape was the person jinxing his broom, but Hagrid doesn't believe them saying that Snape would never do that. Trying to prove Snape is up to something, Harry tells Hagrid about Snape attempting get past Fluffy. Hagrid is shocked that they know about Fluffy and accidentally tells them that somebody named Nicolas Flamel is involved, setting them on a quest to discover who he is and what Fluffy is guarding.