Mewtwo is one of the most powerful Pokemon. With its psychic abilities and high intelligence, it could hold its own against many Dragon Ball Z characters. But then again, characters like Broly in Dragon Ball Z have such insane power levels that it's tough to determine who would ultimately be the most powerful. It would depend a lot on the rules of the crossover universe.
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.
Arceus from the Pokemon world has god - like powers. In a crossover, if it could use its full power, it would be extremely formidable. However, if we consider the power - up potential of Dragon Ball Z characters, someone like Gohan in his Ultimate form could also be very powerful. He has the strength and intelligence to strategize in battles involving both martial arts and Pokemon 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.
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.
Aizen Sousuke is another character from Bleach who could be in the running. His intelligence and his hogyoku - enhanced powers made him a formidable foe. In a crossover with Dragon Ball Z, if he were to face someone like Frieza, he could use his illusions and mind - games to gain an advantage. Frieza is powerful but not as mentally cunning as Aizen. However, if Frieza were to transform into his final form quickly and catch Aizen off - guard, Frieza could potentially win. So again, it depends on how the fight unfolds and who can utilize their powers more effectively.
Well, it could be Whis from Dragon Ball Z. He is an angel who is extremely powerful and has knowledge of many things. In a crossover, his powers would be far beyond what most characters in Bleach could comprehend. He could potentially manipulate the very fabric of the Bleach universe with his angelic abilities. Even compared to Goku and Ichigo, Whis' level of power is on a different scale. He could be the most powerful if he were to get involved in the events of the crossover.
It's likely Goku. His Super Saiyan forms give him incredible power levels that far exceed most of the characters in One Piece. He can move at incredible speeds, has amazing strength, and can fire powerful energy blasts. Even Luffy in his Gear Fifth form would probably have a hard time against Goku at his full power.
It's hard to say for sure, but Goku would be a very strong contender. His ability to keep increasing his power level through training and reaching new forms like Super Saiyan God and Ultra Instinct makes him extremely powerful. However, characters like Franklin Richards in the Marvel universe have reality - warping powers that could also be very hard to defeat. But if Goku were to fully master Ultra Instinct and combine it with the power of the Dragon Balls, he could potentially be the most powerful.
A very powerful pairing could be Whis and Odin. Whis is an extremely powerful being in the Dragon Ball Z universe with near - omnipotent powers. Odin is a powerful Asgardian god. Together, they could use their vast knowledge and powers to manipulate time, space, and reality. They could prevent disasters in both the Dragon Ball Z and Marvel universes or deal with threats that are too powerful for any single hero from either universe to handle.
It's a tough call. Goku has his Super Saiyan forms and incredible combat power. He can destroy planets with his energy blasts. But Yugi has the power of the Pharaoh and his Millennium Puzzle. If he can manage to outwit his opponents in a duel, he can banish them to the Shadow Realm. However, in a direct physical fight, Goku would likely be more powerful. But if the situation was about strategy and using unique powers in a non - combat way, Yugi could be very dangerous.
I think it would be a toss - up between Seto Kaiba and Gohan. Seto Kaiba has his high - tech cards and his own determination to be the best. He could potentially create some really powerful combinations. Gohan, on the other hand, has his Saiyan powers and his intelligence. If he could combine his fighting skills with an understanding of the Yu - Gi - Oh cards, he could be extremely powerful. But ultimately, it depends on how the crossover is written and the rules that are set for the encounter.
Another candidate could be Dialga from Pokemon. Dialga has the power to control time. In a crossover, if it could use its time - control abilities effectively against the Dragonball Z characters, it could be very powerful. For example, it could freeze time and then attack its opponents without them being able to react. But again, Goku has shown the ability to break through all kinds of limitations, so he might still find a way to defeat Dialga in the end.