Here's a breakdown of his appearances:
* Harry Potter and the Chamber of Secrets (2002) - Dobby's first appearance, where he tries to warn Harry of the dangers at Hogwarts.
* Harry Potter and the Chamber of Secrets (2002) - Dobby continues to play a significant role, eventually rescuing Harry and his friends from the Chamber.
* Harry Potter and the Goblet of Fire (2005) - Dobby appears briefly and is a pivotal character in the end-game, warning Harry about the dangers of the Triwizard Tournament and helping him escape the graveyard.
* Harry Potter and the Order of the Phoenix (2007) - Dobby helps Harry and his friends again.
* Harry Potter and the Half-Blood Prince (2009) - Dobby has a brief but impactful appearance in which he aids Harry and his friends.
* Harry Potter and the Deathly Hallows – Part 1 (2010) - Dobby helps Harry, Ron, and Hermione on their quest to find Horcruxes.
* Harry Potter and the Deathly Hallows – Part 2 (2011) - Dobby has a powerful and emotional ending in which he sacrifices himself to protect Harry and his friends.
While Dobby is a beloved character, he has not appeared in any other film outside of the Harry Potter franchise.