Goku would likely be one of the most powerful. His ability to constantly increase his power level through training and his Super Saiyan forms give him an edge. He can also use his ki attacks at a very high level. However, Kirby could also be a strong contender. He has the ability to copy the powers of his opponents. If he were to copy Goku's power, for example, he could become extremely powerful. Another powerful character could be Meta Knight. His swordsmanship and flight abilities combined with his strategic mind would make him a formidable foe in this crossover.
In a Dragon Ball Smash Bros fanfiction crossover, I think Majin Buu could be extremely powerful. He has the ability to regenerate from almost any injury and his absorption ability means he could potentially absorb other fighters' powers. He can also fire powerful energy attacks. But on the other side, there's Ness from Smash Bros. His psychic powers are no joke. He can create shields, heal himself, and attack from a distance. If he were able to use his powers effectively against the Dragon Ball characters, he could be a top - tier fighter. However, Goku's experience in facing powerful foes and his vast array of techniques still might put him at the top of the power list.
It's hard to say for sure, but Vegeta would also be up there. His pride and determination drive him to constantly become stronger. He has his own Super Saiyan forms and powerful energy blasts. In the context of a crossover, he would not hold back against any opponent. Then there's Master Hand from Smash Bros. It has the ability to manipulate the game world and is a very large and powerful entity. If it were to face off against the Dragon Ball characters, it could be a very tough battle. But overall, Goku's near - limitless potential for growth might still make him the most powerful in the long run.
It's likely Goku. His Super Saiyan forms give him incredible power, speed, and energy attacks. He can constantly increase his power level and has a lot of combat experience from his battles in the Dragon Ball series.
It could be Naruto in his Nine - Tails Chakra Mode. He has immense power and speed, which would give him an edge in the Smash Bros battles.
It's really hard to say. Goku has the power to destroy planets with his Super Saiyan forms. But Naruto, when he taps into the full power of the Nine - Tails and combines it with his Sage Mode and other jutsu, is also extremely powerful. However, if we consider Goku's ability to constantly increase his power level through training and transformations, he might have an edge in raw power.
However, you can't discount characters like Kirby in this context. Kirby has the ability to copy the powers of his opponents in the Super Smash Bros games. If he were to face Naruto characters, he might be able to copy their jutsu and use it against them. Also, his floating ability and quick attacks make him a formidable foe. So, it really depends on how the author of the fanfic wants to balance the powers and abilities of the different characters.
Naruto and Kirby would be really interesting. Kirby could copy Naruto's abilities, like his running speed or his ability to use chakra. And Naruto could be amazed at Kirby's cuteness and his unique way of fighting, like inhaling enemies. They could have a really fun dynamic together.
However, Saitama from One Punch Man (if we were to include him in this crossover fanfiction for the sake of comparison) would be extremely powerful. His one - punch ability means he can defeat almost any opponent with a single strike. But in the context of My Hero Academia characters only, Todoroki might also be a strong contender. His ability to control ice and fire gives him a great range of offensive and defensive capabilities in the battles.
Well, if we consider that in the Sonic universe, there are characters like Shadow who has his own unique abilities and is very powerful. In a crossover, if he were to gain some of the Saiyan abilities like ki control, he could be a formidable force. But then again, Vegeta with his pride and combat experience wouldn't be one to back down. He might be able to figure out Sonic's speed patterns and counter them. So it's not easy to determine who would be the most powerful. It could also be a new character that emerges from the combination of the two universes' power sources.
It's really hard to say. Goku in his Super Saiyan Blue form has incredible power and can destroy planets with ease. However, Naruto in his Baryon Mode also has a huge amount of power. But if we consider the potential for growth, Goku has more forms to achieve and more power - ups in his arsenal. So, he might be considered the most powerful in the long run. But Naruto's ability to use his intelligence and his wide range of ninja techniques could give him an edge in certain situations.
It's hard to say, but Goku would be a top contender. His ability to constantly increase his power level and learn new techniques would make him a force to be reckoned with, even in a world with Pokemon. He could potentially use his Ki to enhance the abilities of any Pokemon he teams up with.
If we consider the potential of power - up in a crossover, it might be a new form of Goku. Imagine if Goku were to combine the power of the Saiyan God form with some of Devilman's demon - like abilities. He could become an entirely new and extremely powerful entity. But then again, Devilman has the potential to merge with other powerful demons in his world. So, in a sense, it could be either Goku with his new form or a super - powered Devilman depending on how the fanfiction unfolds.