[quote=@Blackbeard]
[@RolePlayerRoxas] That certainly would be an interesting idea [s]not at all what I had in mind for one of the Arrancar[/s] but I wasn't sure about using it myself. It would make your character similar to Ukitake in which he rarely uses his Shikai and definitely Bankai, which is fine, but I guess it would mean a more...reluctant kind of character? I think using an ability like that too many times would become tiresome as the fights would have the same kind of dynamics (What's your ability? my ability? I'm shocked. But it's my ability, I know it entirely. Sploosh) obviously the fights wont necessarily go that way but. 
[/quote]

To clarify, my intentions for such a power is that it's only ever a last resort. While the character himself would have reservations about using 'other people's tricks', another issue for the ability would be... however it's applied. For example, if it could copy zanpakuto's down to their released forms, there'd be the issue of "Okay, so I copied Odaiba's huge-ass mace... except I have no idea how to fight with a mace". And even if it was a weapon he was comfortable with, he'd still need knowledge of its abilities and how to use them.

In short, he'd have to research literally everyone's abilities and fighting styles, somehow train to be proficient in every type of weapon you could imagine, and pray that he can use said abilities better than the original wielder. So instead of all that, he'd focus more on swordsmanship and probably defensive kidos to fight, and leave his shikai/bankai as last resorts.

...That said, if you have a villain that would use that ability, I can always find something less bothersome to go for.