Question: Which Harry Potter film was #2 when Kamen Rider Decade: All Riders vs. Dai-Shocker opened at the #1 spot?

<P0-S0>  Pictures. <P0-S1>  It is based on the novel of the same name by J. K. Rowling. <P0-S2>  The film, which is the sixth instalment in the "Harry Potter" film series, was written by Steve Kloves and produced by David Heyman and David Barron. <P0-S3>  The story follows Harry Potter's sixth year at Hogwarts as he receives a mysterious textbook, falls in love, and attempts to retrieve a memory that holds the key to Lord Voldemort's downfall. <P0-S4> Harry Potter and the Half-Blood Prince is a 2009 British-American fantasy film directed by David Yates and distributed by Warner Bros. <SEP> <P1-S0> Kamen Rider Battle: Ganbaride (仮面ライダーバトル ガンバライド , Kamen Raidā Batoru Ganbaraido , "Masked Rider Battle: Ganbaride") is a combination of an arcade game and a collectible item game featuring the protagonists of the Kamen Rider Series. <P1-S1>  The game is being released as part of the 10th anniversary of the Heisei run Kamen Rider Series by Toei, TV Asahi, Ishimori Productions, and Bandai and features heavy tie-ins with the television series "Kamen Rider Decade", whose protagonists use cards similar to those used in the game. <P1-S2>  It is played in a similar fashion to Sega's "" and "Dinosaur King" games, and uses special Data Cardass cards released by Bandai. <P1-S3>  The game's card input uses collectible card game terminologies, and has resemblance and functionality similarly to the Decadriver in "Decade". <P1-S4>  As the series progresses, the game controls change to suit the new Kamen Rider. <P1-S5>  During the airing of "Kamen Rider OOO", "Ganbaride" arcade systems included an OOO Driver interface for the toy Core Medals, and with the broadcast of "Kamen Rider Fourze", slots for the Astro Switches became available, and the system became 3 VS. 3. <P1-S6>  With the current broadcast of "Kamen Rider Wizard", Wizard Rings are available to use, and the game has reverted to 2 VS. 2 battles. <P1-S7>  Ever since "Kamen Rider Gaim"'s TV series airing until onwards, the game is now renamed to Kamen Rider Battle: Ganbarizing (仮面ライダーバトル ガンバライジング , Kamen Raidā Batoru Ganbaraizingu , "Masked Rider Battle: Ganbarizing") . <SEP> <P2-S0> Kamen Rider Decade the Movie: All Riders vs. Dai-Shocker (劇場版 仮面ライダーディケイド オールライダー対大ショッカー , Gekijōban Kamen Raidā Dikeido Ōru Raidā Tai Daishokkā , "Masked Rider Decade the Movie: All Riders vs. Dai-Shocker") is the superhero film adaptation of the 2009 Kamen Rider Series "Kamen Rider Decade". <P2-S1>  In its first week in theaters, it opened at the #1 spot, edging out "Harry Potter" (#2) and "" (#3), earning over 2 billion yen (approx. <P2-S2>  US$21M) in box office revenues. <P2-S3>  It is the highest grossing Kamen Rider film to date. <P2-S4>  The film was released in Japanese theaters on August 8, 2009, alongside the "Samurai Sentai Shinkenger" film, "". <SEP> <P3-S0> OOO, Den-O, All Riders: Let's Go Kamen Riders (オーズ・電王・オールライダー レッツゴー仮面ライダー , Ōzu Den'ō Ōru Raidā Rettsu Gō Kamen Raidā ) is a film released on April 1, 2011, to commemorate the 40th anniversary of the Kamen Rider Series. <P3-S1>  While the film will feature all of the franchise's protagonists, the main heroes of the original "Kamen Rider" (1 & 2), "Kamen Rider Den-O", and "Kamen Rider OOO" will be the main characters. <P3-S2>  The film's subtitle "Let's Go Kamen Riders" is an homage to the theme song of the original series, . <P3-S3>  The film also marks the 60th Anniversary of the Toei Company and to commemorate it, the film features characters from other works of Shotaro Ishinomori: Kikaider, Kikaider 01, Inazuman, and Zubat.