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, the Naruto - Mumm - Ra fusion could be described as a being of contradictions. It would have Naruto's kind heart warring with Mumm - Ra's evil intentions. Physically, it could be like a mummified ninja, with Naruto's features distorted by Mumm - Ra's presence. Its abilities would be a chaotic combination. It could use Naruto's shadow clones but with a dark twist from Mumm - Ra. And when it uses its power, there could be a mix of Naruto's bright chakra and Mumm - Ra's inky black energy.
One possible plot twist could be that Cheetara discovers Mumm - Ra's true nature only after the marriage. Maybe she thought she could change him, but then realizes he has some dark ulterior motives that put her and her friends in danger.
The other characters would likely be very shocked. For example, Lion - O, who might have had feelings for Cheetara, would be heartbroken. And the Thundercats as a whole would be distrustful of Mumm - Ra and might see Cheetara as a traitor.
Another possibility could be Monkian. He might suspect that Cheetara is not fully loyal to Mumm - Ra and start his own investigation. His actions could put Cheetara in danger as she is already in a difficult position as a servant. And if he finds out the truth, he could expose her to Mumm - Ra, which would be a huge threat.
The power balance would be greatly affected. If fanfiction gives Naruto some overpowered abilities like instant teleportation across any distance, it would make many of his battles much easier. Enemies that were once a threat would no longer be so.
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.
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 this fanfiction plot, a powerful sorcerer or some sort of interdimensional being could be the cause of the fusion. The fused Naruto - Goku would have an insane amount of power. They could travel at super - fast speeds like Goku and also use shadow clones like Naruto. Their power level would be off the charts. They might end up in different parts of the new world they're in, trying to find each other and figure out what happened, all while being chased by enemies who want to study or destroy their new form.