In the comic world, adamantium doesn't poison Wolverine. It's bonded to his skeleton and gives him enhanced strength and durability rather than causing any harm or poisoning.
Sure does. There are specific arcs where Wolverine's adamantium is removed for various plot reasons. This often leads to significant changes in his character's abilities and story development.
If Naruto has adamantium bones in the fanfiction, it would likely enhance his combat in multiple ways. Firstly, his body would be more resistant to damage from blunt force. When he clashes with opponents, his bones wouldn't break easily. Secondly, he could use his bones as a weapon in a more aggressive way. For example, if he were to perform a head - butt or a bone - based jutsu, the adamantium would make it extremely effective.
Naruto is obviously one of the main characters, as the title implies his connection to the fanfiction. There might also be Sasuke. Since Sasuke is often involved in Naruto's story, in this fanfiction, he could be either an ally or a rival in the context of the adamantium - related plot.
In 'naruto adamantium fanfiction', perhaps there could be a plot where Naruto discovers a way to infuse his chakra with adamantium - like properties. This would not only enhance his physical attacks but also his ability to defend. It could lead to new jutsu development that combines the power of his chakra and the strength of adamantium.
One interesting 'Harry Potter Adamantium' fanfiction could be one where Harry discovers a hidden stash of Adamantium in Hogwarts and uses it to enhance his magical items. For example, he might use it to create an indestructible wand. Another could involve a crossover where Wolverine from the X - Men (who has Adamantium in his skeleton) visits the Harry Potter world and teaches Harry some combat skills using his Adamantium claws.
Wolverine does get his adamantium back in specific comic storylines. This often occurs after intense battles and adventures that lead to his restoration of this key attribute.