Well, Naruto might gain some really strange abilities. Cell can regenerate and absorb energy. So Naruto could potentially have super - enhanced healing powers. He might also be able to absorb chakra from others like Cell absorbs energy. This could make him extremely powerful in battles, being able to quickly recover from injuries and constantly boost his power.
In a fanfiction where Naruto fuses with Cell, it would completely change the Naruto universe. Naruto's friends might be a bit scared or at least very surprised at first. His enemies would have to come up with new strategies to fight him. Naruto's already strong willpower combined with Cell's survival instincts would make him an almost unbeatable force. He could use his shadow clones in new and creative ways. For example, he could send out clones to absorb chakra from different sources simultaneously and then transfer all that chakra back to himself for a huge power - up.
In such a fanfiction fusion, Naruto might gain some of Bardock's battle instincts. Bardock was a fierce Saiyan warrior, so Naruto could potentially have an even greater edge in combat. He might also inherit some of Bardock's Saiyan traits, like enhanced strength and speed at a more fundamental level. This could make him even more formidable against powerful foes in the Naruto universe.
Well, it could be really cool. Naruto's ninja skills combined with Vegeta's Saiyan power would make for an extremely powerful being. Maybe they'd have Naruto's ability to create multiple clones and Vegeta's energy blasts at the same time. They could also inherit Naruto's determination and Vegeta's pride, which would make for a very interesting personality mix.
If Naruto fused with Ichigo in fanfiction, it would be amazing. Firstly, their physical abilities would combine. Naruto's enhanced strength and speed from his training, along with Ichigo's superhuman Soul Reaper physique, would make the fused form extremely formidable in battle. Also, their energy sources could merge. Naruto's chakra and Ichigo's reiatsu might form a new type of power that could be used in different ways. It could also lead to a very interesting story arc, with the fused character having to deal with the memories and emotions of both Naruto and Ichigo.
Well, he would probably become extremely powerful. His already impressive chakra reserves would be multiplied many times over with the Juubi's power. He might gain new and unique jutsu that are a combination of his own and the Juubi's abilities.
Well, it would be an extremely powerful combination. Naruto has his ninja skills and chakra, while Broly is a Saiyan with insane strength. Maybe they'd create new and unique fighting techniques. Their fused form could have Naruto's determination combined with Broly's raw power, making them a force to be reckoned with in the fanfiction universe.
In such a fanfiction, Naruto's powerful chakra could be combined with Madara's Uchiha abilities in really interesting ways. Naruto might gain new Sharingan - like powers or be able to use some of Madara's signature jutsu more effectively. And their combined strength would probably make them nearly unbeatable in battle, changing the power dynamics in the Naruto universe completely.
If Naruto and Mumm - Ra fused, it could result in a very unique appearance. Naruto's spiky hair and orange jumpsuit might mix with Mumm - Ra's skeletal and mummified look. In terms of powers, Naruto's Rasengan could potentially be infused with Mumm - Ra's dark energy, creating a super - powerful and dangerous attack. This fusion would also likely have a complex personality, as Naruto is generally upbeat and Mumm - Ra is full of malice.
In a fanfiction where Naruto fuses with Majin Buu, there could be some really wild power combinations. Naruto's chakra and Buu's unique abilities like regeneration and absorption might create a super - powerful being. For example, Naruto could potentially use his Rasengan with Buu's stretchy body to create new and unpredictable attacks.
Well, he would probably have Cell's abilities like regeneration and the ability to absorb others. Maybe he'd use these powers in a different way than Cell did. He could be more heroic with them, like using the absorption power to take away the powers of bad guys instead of just to become stronger in a selfish way.
His personality could become more calculating. Since Cell is a rather cunning and strategic being, Naruto might start to think more like a tactician. He'd still have his core values of protecting his friends and the village, but he'd approach battles with a different mindset.