One scenario could be that Harry uses his invisibility cloak to help Crane study his patients without being noticed. This would allow Crane to get a more accurate understanding of their behaviors.
Well, Harry Potter could use his magic skills to help Jonathan Crane face his inner demons. Maybe he could use a spell to calm Crane's fear-induced madness.
There's a fanfic called 'The Fearful Alliance'. In this one, Crane teams up with Batman, albeit reluctantly at first. It's interesting because it shows how two characters with such different motives can find common ground. It has some really cool action scenes and in - depth character dialogues.
Maybe some of the Hogwarts professors like Professor Sprout. After all, she's the Herbology teacher. She could give Harry some expert advice on how to grow different kinds of food plants. She might even let him use some special greenhouses or tools in the school for his food - growing projects.
The mystery around Jonathan Crane makes the fanfiction interesting. He's a complex character with his fear - based motives. When paired with Batman, it creates a lot of tension and drama.
Yes, there are some fanfictions out there where the two universes cross paths and Harry Potter might help Superman in some way. You can try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own.
Yes, there are some out there. Some fanfictions might explore the idea of Harry Potter helping Voldemort in an alternate universe where their goals are misaligned or there are complex magical reasons for it. For example, in a situation where Harry believes he can change Voldemort's ways by getting closer to him, rather than fighting him directly.
One great fanfiction where Snape helps Harry Potter is 'The Unseen Bond'. In this story, Snape secretly protects Harry from a new dark threat at Hogwarts. He uses his knowledge of the Dark Arts to counter the enemy's spells. This shows a different side of Snape, one that is more benevolent towards Harry.
One possible plot could be that Superman is somehow transported to the wizarding world. He's lost his powers there, and Harry Potter has to help him get back to his own world while also protecting him from the various magical threats in the wizarding world. Along the way, Harry could teach Superman some basic magic to help him defend himself, and Superman could use his strength and heroism in a different way within the magical setting.
One main theme is friendship. Harry forms new friendships with the unsullied as he helps them. Another theme is redemption. By helping the unsullied, Harry might be seen as redeeming some of the wrongs in the wizarding world. And of course, there's the theme of heroism as Harry steps up to help those in need.