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.
In some comic storylines, Wolverine gets his adamantium back through complex and unexpected circumstances involving advanced technology or powerful allies.
In the comics, Wolverine's recovery of his adamantium was often tied to new story arcs and developments. It could involve uncovering hidden technology or facing off against villains with the means to restore it.
Sure. In the Star Wars universe, there's cortosis. This material has the ability to short - out lightsabers on contact. It's so strong that it can resist the intense energy of a lightsaber blade, which is a very powerful weapon in that fictional realm. So it must be made of some really tough stuff.