Nobita and the Winged Braves , Doraemon Nobita to Tsubasa no Yshatachi? is a featurelength Doraemon film which premiered onMarch 2001.
Arriving at Birdopia, Gian and Suneo are captured by crow soldiers and brought to the vulture Commander Seagrid, who plans execution for them. Meanwhile, Doraemon, Nobita, and Shizuka find Gusuke near the owl Professor Hous house after fleeing from the same crow soldiers with the help of an ostrich taxi service. Hou explains that Birdopia is a world existed far away from human world and is connected only during bird migration, which are guarded by Bird Migration Patrolling Troops. Seagrid was once a member of the troops, but he was shot by humans and retired shortly, seeking vengeance at them. After Hou advises them to take cover as not many liked humans in Birdopia, Doraemon brings Bird Hats which can sprout wings by wearing them, with him as a pigeon, Nobita a duck, and Shizuka a swan. The three and Gusuke manage to stage a rescue of Gian and Suneo shortly thereafter, and Doraemon gives them Bird Hats of an albatross and a woodpecker respectively. Gusuke informs Nobita and his friends that there will be an annual competition, Rally Icarus, which is used to recruit members of the Patrolling Troops, and that they should join it. During a dinner with Gusukes parents and his friend, Milk, Gusuke confesses that he is actually adopted and that he is unable to fly naturally due to the trauma of falling he got before being founded. Meanwhile, Hou translates an ancient Birdopia tablet which contains information about Phoenicia, an ancient dragonlike being who can bring destruction to the world. The captain of the crow soldiers reports to Seagrid after overhearing it, after which Seagrid kidnaps Hou for the location of Phoenicia so he will be able to use it to destroy humanity.During Rally Icarus which takes place at a giant tree called the Perched Tree, Gusuke manages to win but gets disqualified when Seagrids falcon lieutenant Babylon, by Seagrids orders, explains that he did not fly naturally. The group later realize that Hou is missing and after Doraemon learns about P
Source: Wikipedia