One possible ending could be that the person with black teeth discovers a magical cure and their teeth turn white again, leading to a new life of acceptance.
Perhaps in the 'black teeth story', the black teeth end up being a key to unlocking a hidden treasure. So, in the end, the character with black teeth is celebrated for this unique feature. Another ending could be that the society in the story gradually accepts black teeth as a normal and beautiful thing, and the character with black teeth no longer feels out of place.
It could be that the serious man discovers a strange mark on one of his teeth. He becomes obsessed with finding out what it is, visits multiple dentists, and in the process, he learns some important life lessons about his own health and how he has been neglecting himself due to his seriousness.
Maybe the cat, despite all the sadness, manages to form a little community with other stray animals for support and survival. Or it could be that an animal rescue organization steps in and takes the cat in, nurses it back to health if it was ill, and then finds it a forever home.
One possible ending could be that things turn around for papaw. He could receive support from his family or community and start to feel happy again.
The lizard could also form new relationships with other lizards in the area. It overcomes its sadness by building a new life with its new friends, sharing resources and living happily in its new environment.
The pigeon might reunite with its flock in the end. After going through all the hardships and being sad for a while, it manages to find its way back to its group. They welcome it back, and it no longer feels lonely and sad. Another ending could be that the pigeon, despite its sadness, adapts to its new situation. It learns to be more independent and finds new sources of food and places to rest, so it becomes less sad over time.
One possible ending could be that the cheerleader finds support from a new friend or mentor. This person helps her to see her worth beyond her problems, and she slowly starts to regain her confidence and happiness in cheerleading.
One possible ending could be that she manages to free her feet by herself. She might use some oil or another solvent she finds nearby to loosen the glue's grip on her feet and then clean them up.
One possible ending could be that the old woman manages to chase the snake away. She uses her walking stick to frighten it, and the snake slithers off into the bushes.
One possible ending could be that the camper is killed by a bear. The camper was maybe cooking food and the smell attracted the bear. The bear attacked suddenly and the camper had no chance to defend himself.
One possible ending could be that they both end up living their lives separately but always thinking about each other, haunted by what could have been. They are never truly happy again because they lost their one true love.