Sure. 'My Hero Academia: Halloween Hijinks' is a great one. It has the characters in some really fun and spooky situations during Halloween. The story is full of action and the unique quirks of the characters add to the overall charm.
Some characters in bnha scary stories are unique to those stories. These new characters are often created to add to the spooky or suspenseful atmosphere. They might have really strange or terrifying quirks that we don't see in the main series. For instance, a character with a quirk that allows them to manipulate shadows into terrifying shapes that can attack people. So, in many ways, they are different from the characters in the main series.
Yes, the Bnha manga has finished. The final chapters wrapped up the plotlines and brought closure to the series. It's been quite an adventure for fans.
I once heard a true Halloween story. A family was driving home after a Halloween party. Suddenly, they saw a figure in white standing in the middle of the road. They slammed on the brakes. When they looked again, the figure was gone. They were really spooked and drove the rest of the way home very quickly.
Some powers might need to be toned down. For example, Todoroki's ice and fire powers could cause a lot of damage in the real world. He'd have to learn to control them more precisely so as not to cause destruction. And some powers might be more useful in unexpected ways. Uraraka's zero - gravity power could be used for things like helping with construction or moving heavy objects in a safe way.
It could be integrated through a quirk accident. Maybe Izuku is exposed to some strange energy during a battle or an experiment gone wrong, and this gives him the ability to see ghosts. This would be a believable way to introduce the concept within the context of the BNHA world's science - based quirks.