The story of how the tortoise got his crooked shell varies depending on the culture and region, as it is a folk tale that has been passed down through generations. Here is one version of the story:

Long ago, in a jungle, there was a tortoise who was known for his pride and arrogance. One day, the tortoise saw a pair of beautiful wings lying on the ground. He decided to put them on and prance around, pretending to be a bird.

However, he soon realized that he could not fly like a bird and took off the wings. As he was removing them, his shell became twisted and deformed. The tortoise was devastated at the sight of his crooked shell and decided to hide from the world.

One day, the other animals in the jungle noticed that the tortoise was nowhere to be found. They searched high and low and eventually stumbled upon him in a cave. They asked the tortoise why he was hiding and he revealed the story of how he got his crooked shell.

The animals were amused and realized that the tortoise's pride and arrogance had led him to his current state. They decided to teach him a lesson and help him become a more humble creature.

Over time, the tortoise learned to be humble and kind to others. He no longer cared about his crooked shell and instead focused on being a good friend and neighbor to the animals in the jungle.

And that is how the tortoise got his crooked shell, according to this particular version of the story.