It could be Ben when he transforms into Alien X. Alien X has near - omnipotent powers, like being able to manipulate reality. In a crossover, he could use these powers to easily defeat most enemies. However, the Power Rangers also have their strong Megazord combinations. If they could find a way to counter Alien X's powers, they might stand a chance.
The Red Ranger could also be considered very powerful. He often has strong leadership skills and combat abilities. In a crossover, if he were to gain some of Ben's alien powers, like the strength of Four Arms, he could become an extremely formidable opponent. But on the other hand, Ben has a whole range of alien forms to choose from, so it's a tough call.
In a way, the combined power of all the Power Rangers working together as a team could be the most powerful. They have their Zords, their teamwork, and their individual skills. But Ben with the Omnitrix has the advantage of being able to adapt to different situations with different alien forms. It really depends on how the crossover is written and what kind of challenges they face.
The Red Ranger would likely be a top contender for the most powerful. They usually have strong leadership skills and often the most powerful attacks among the team. However, if we consider villains, Rita Repulsa could be very powerful in an Infinity War scenario. With her magic and cunning, she could cause a lot of trouble for the Rangers.
Sasuke would be really interesting. He's already so powerful in the Naruto universe, and if he got Power Rangers' powers, he'd be unstoppable. His brooding nature combined with ranger powers could create a really complex and cool character.
It's likely that Ben with the Omnitrix would be one of the most powerful. He has access to a wide variety of alien forms, each with their own unique abilities. For example, Heatblast could deal with cold - based threats in the Rosario Vampire world, and XLR8 could outrun any fast - moving vampires or enemies. However, some of the powerful vampires like Alucard in Rosario Vampire also have incredible strength, speed, and magical abilities. So it could be a close call between Ben in his most powerful alien forms and the top - tier vampires.
Definitely Deku and the Red Ranger. Deku is all about growth and determination, and the Red Ranger is often the leader and a symbol of courage. They could inspire each other in different ways. Deku could learn more about leading from the Red Ranger, and the Red Ranger could be inspired by Deku's never - give - up attitude towards getting stronger.
It could be Ben when he transforms into Alien X. Alien X has near - omnipotent powers. He can manipulate reality on a cosmic scale. In a crossover, he could potentially use those powers to control the Nanites or even restructure Rex's powers in some way. However, he's also very difficult to control, so it's a double - edged sword.
It's really hard to say. Danny has some incredibly powerful ghost abilities like intangibility, flight, and his ghostly wail. But Ben has access to so many different alien forms, each with their own unique powers. However, if we consider the fact that Danny has a connection to the Ghost Zone which gives him an almost unlimited source of power in a way, he might be the most powerful. But then again, Ben in his Alien X form has near - omnipotent power. So it really depends on how you define 'powerful' in the context of this crossover.
Trent, the White Dino Thunder Ranger, could be a great focus. If we were to include him in this crossover, his connection to the Dino powers and his experience as a Ranger would add a lot. In the Victorious world, he might be a bit of an outcast at first because of his different background. But he could use his Ranger skills to protect the Victorious gang from any threats, and his journey of adapting to this new, more artistic world would be fascinating to explore.
Ben Tennyson and Tommy Oliver would be a great combination. Ben with his Omnitrix and Tommy, the experienced Power Ranger, could share their knowledge and skills. Tommy could teach Ben about leadership and teamwork in the context of the Power Rangers, while Ben could show Tommy the different alien abilities from the Omnitrix. They could also combine their powers in creative ways to defeat enemies.
Well, Danny Phantom has the ability to phase through objects and fly at high speeds, which is really cool. Ben 10 can transform into so many different aliens, each with their own unique powers. And Kim Possible is super athletic and has all those useful gadgets. However, I think Ben 10 might be the most powerful in a crossover. His Omnitrix gives him access to a wide variety of powers that can be used in different situations. For example, if they were in a fight underwater, he could transform into an alien that is adapted to aquatic environments. But again, it's all about how the story is written and what challenges they face.
One possible plot could be that the Omnitrix somehow gets mixed up with the Power Rangers' technology. Ben, as one of the Power Rangers, has to figure out how to use both the alien powers from the Omnitrix and the Ranger powers to fight a new, super - powerful villain. For example, he could use Heatblast's powers in combination with the Red Ranger's sword to defeat an enemy that is immune to normal attacks.