In the past, Tom's magical abilities were already quite strong even as a young student. His natural talent for magic was evident. However, if Harry travels back in time, he would bring with him the knowledge and skills he has learned in his own time. So in terms of spellcasting knowledge, Harry might have an edge as he knows spells that were not yet invented or commonly known in Tom's time. But Tom's raw power and his understanding of magic from his own era's perspective would be formidable.
If Tom travels to the future, he would find that magic has evolved. Harry, having grown up in this more advanced magical world, would be more accustomed to the new types of magic and magical devices. For example, Harry is familiar with things like the Marauder's Map which uses a complex form of magic. Tom would need to adapt to these new forms of magic. However, Tom's ability to quickly learn and his ambition might make him catch up fast. He might also bring a different perspective on magic that could even surprise modern wizards with his unique interpretations of spells and magic theory.
When both are in a different time period, say an ancient time in the wizarding world, their magical abilities would be tested in different ways. The magic in ancient times might be more raw and less refined. Tom's natural inclination towards the dark arts might give him an advantage in some ways as he could quickly adapt to the more primal forms of magic. Harry, on the other hand, with his strong moral compass, might be able to find a way to use the magic in a more positive and creative way. Their different approaches to magic based on their personalities and experiences would make for an interesting comparison in any time - traveling scenario.
His combat abilities might be overpowered in some earlier time periods where the fighting styles are less developed. For example, if he travels back to a time when lightsaber combat was more rudimentary, his advanced techniques could make him seem like a god of war.
In a time period during the height of the Covenant War but in a different theater of war, his abilities would be put to different tests. He might face different Covenant species or new strategies. His ability to adapt and his leadership skills would be crucial. His physical abilities would remain a great asset, but he'd have to use them in new and creative ways to deal with the changing battlefield dynamics.
In earlier time periods, like the medieval times of the wizarding world, their relationship might be more formal at first. They'd be outsiders in that time, so they'd rely on each other more. Fleur's Veela charm might be seen as more of a novelty or even a threat in that era, which could make Harry more protective of her. This would strengthen their bond.
In the past, Usopp's abilities like his slingshot skills might be seen as more primitive compared to the advanced weaponry in his own time. But his creativity could give him an edge. For example, in a time when there were less advanced long - range weapons, his slingshot could be a very unique and effective tool. In the future, if he travels there, his abilities might seem obsolete at first. However, he could adapt by using his knowledge of old - fashioned combat and combine it with the new technology he finds.
In the era of the Old Republic, Starkiller's abilities would be quite different. The Force was more in tune with the natural order then. His raw power might be more subdued as he would have to adapt to the more traditional ways of the Jedi and Sith. For example, his lightsaber combat might become more refined in the style of the ancient Jedi, rather than his more aggressive style from his own time.
Judy Hopps, being an adaptable bunny, would likely quickly adjust to different time periods. In the past, she might be initially shocked by the more primitive ways but would soon use her problem - solving skills. For example, if she went back to a time before modern technology in Zootopia, she could use her natural instincts and basic tools to get by. Nick Wilde, on the other hand, would probably rely on his charm. In a more old - fashioned Zootopia, he might use his smooth - talking to blend in and find his way around.
In the past, Luffy would likely be even more of a novelty. His fearless and somewhat naive attitude would stand out in an era where pirates were perhaps more cutthroat and calculating. He might bring a sense of hope and a different way of thinking to those around him. Law, in the past, could be seen as a bit of an enigma. His quiet and strategic nature might make him seem like a dangerous wildcard. In the future, Luffy could struggle to adapt to new social norms, but his unwavering loyalty and determination would still shine through. Law might be more intrigued by the future's medical advancements and would be eager to learn and incorporate new knowledge into his own skills.
For Killer Croc, it would be a bit of a struggle. In a more civilized time period, he'd have to hide his appearance and find ways to stay out of sight. But he might also discover new places to hide, like old sewers or caves. El Diablo could use his powers in a more discreet way in different time periods. He might be seen as a sorcerer or something supernatural, which could work to his advantage or get him into trouble. And Captain Boomerang would likely try to steal valuable items from different time periods to make a profit when he gets back, but he'd also have to deal with the different laws and cultures.
Natsu, being his impulsive self, might initially have a hard time adjusting to more reserved time periods. For example, in a time when magic was more secretive and not used so openly, he might constantly be getting into trouble for showing off his powers. Ultear, on the other hand, who is more calculating, might find it easier to blend in. But in a more chaotic time period, like during a war, Ultear's calm demeanor could be shaken as she has to face more extreme situations. In a peaceful future time, Natsu might become more laid - back as there's no need for constant fighting, while Ultear might feel a bit out of place without her usual problems to solve.
In a time travel fanfiction, Naruto's ability to sense danger might be sharper as he knows the big events that are supposed to happen. He could also train his Rasengan in new ways based on his future experiences. Sakura might be able to use her strength in a more controlled manner, having seen the consequences of over - using or under - using it in the future. Shikamaru could have an edge in planning battles because he's aware of different fighting styles from the future. Choji could find new ways to boost his strength using the knowledge he has of future food combinations that enhance chakra. And Ino could use her mind - transfer jutsu more precisely, having learned from future mistakes.