Winnie the Pooh (2011)

Set inside a storybook, the film follows the adventures of Christopher Robin and his friends, including Winnie the Pooh, who live in the Hundred Acre Wood and can interact directly with the book's narrator and text.
One morning, Pooh discovers that he has run out of honey. While searching for more, he visits Eeyore and notices that Eeyore's tail has gone missing. A contest is later held, offering a pot of honey as a prize for any participant who can find a suitable replacement tail for Eeyore, but every attempt fails.
Later, Pooh arrives at Christopher Robin's house to ask for honey, but finds him gone, and a note left behind. As Pooh shows the note to his friends, Owl reads it and concludes from the words written that Christopher Robin has been abducted by a creature called the "Backson". Rabbit comes up with a plan to trap the Backson by leaving a trail of items leading to a pit.
Elsewhere, Tigger, who is unhappy with Rabbit's plan, decides to hunt down and battle the Backson on his own. He soon finds that Eeyore was accidentally left behind by the gang during their plot and decides to take the donkey under his wing. While training Eeyore, Tigger dresses up as the Backson to teach Eeyore how to fight. Eeyore eventually abandons Tigger and hides underwater, where he discovers an anchor and decides to use it as a replacement tail.
While struggling to follow through with Rabbit's plan, Pooh falls into the Backson pit after finding an empty honey pot above it. Reuniting with Eeyore, Rabbit's party tries to use Eeyore's anchor to free Pooh, but its weight knocks everyone but Piglet into the pit. Piglet heads towards Christopher Robin's house to find a rope to rescue everyone, but he gets frightened off after spotting Tigger in his Backson costume. A chase ends with both of them falling in the pit along with letters from the book's text, which Pooh uses to build a ladder for everyone to climb out.
Christopher Robin returns and clarifies that the letter he left actually said he had gone to school and would be back soon. Pooh continues his search for honey. He visits Owl's house, where he discovers that Owl has been using Eeyore's tail as a bell pull, unaware of who it belonged to. Owl allows Pooh to take the tail, and offers him a pot of honey, but Pooh declines the offer and promptly returns Eeyore's tail. As a reward for this act of selflessness, Christopher Robin declares Pooh the winner of the contest and presents him with an enormous pot of honey.
In a post-credits scene, the Backson is revealed to be real, but surprisingly friendly. He discovers the items left by Pooh and his friends and ends up falling into their pit.