Well, start by imagining different possible outcomes based on the story's setup and characters. Let your creativity flow and don't be afraid to think outside the box.
An alternate ending could be that the Huntsman sacrifices himself to save Snow White. He could step in front of a fatal blow meant for her, and in his dying moments, Snow White realizes just how much he means to her. This would be a tragic yet powerful ending, showing the depth of their connection.
One alternate ending could be in 'Snow White'. Instead of the prince waking her with a kiss, Snow White wakes up on her own after a dream of her mother. She realizes she has the strength within herself and doesn't need a prince to save her.
One alternate ending could be that the main character decides to give up their quest and live a simple life instead. This could completely change the tone of the story.
One possible alternate ending could be that Twilight Sparkle uses her magic in a completely unexpected way to stop the wedding chaos and actually uncovers a plot that was much deeper than anyone thought, leading to a celebration of friendship rather than a wedding.
Perhaps an ending where Bowser's inside world and the outside world merge in a positive way. The characters from both realms learn to co - exist and build a new, harmonious land together. For example, Mario and his friends could team up with Bowser's minions to create a utopia. The toads could teach the minions about gardening and building, while the minions could share their knowledge of the more dangerous areas of the kingdom with the toads.
One possible alternate ending could be that the main character manages to escape the war - torn city and finds a peaceful place to start a new life. Maybe he discovers a hidden community that accepts him and he finally gets to experience some normalcy.
Another ending might be that the gingerbread man outruns all the animals but then he comes across a kind little girl. The girl offers to share him with her friends instead of eating him all by herself. So, he gets to be part of a fun party.
One possible alternate ending could be that Carrie realizes her powers don't have to be used for destruction. She uses them to help people instead, like rebuilding the town she damaged. This would show a redemptive arc for her character.
One alternate ending might involve a twist where a previously minor character plays a crucial role in resolving the story. Another could have a happier resolution for all the characters, contrary to the original's tone.