There have been eleven released so far with a twelfth on the way.

• Pokémon: The First Movie (1999)
• Pokémon: The Movie 2000 (2000)
• Pokémon 3: The Movie (2001)
• Pokémon 4Ever (2002)
• Pokémon Heroes (2003)
• Pokémon: Jirachi Wish Maker (2004)
• Pokémon: Destiny Deoxys (2005)
• Pokémon: Lucario and the Mystery of Mew (2006)
• Pokémon Ranger and the Temple of the Sea (2007)
• Pokémon: The Rise of Darkrai (2008)
• Pokémon: Giratina and the Sky Warrior (2009)
• To the Overcoming of Space-Time (2010)


Anywho, Pokémon 3 is the one you're looking for. The feature portion of the film was titled "The Spell of the Unown."