sinc, im pretty sure that "Bulletproof" is taken.
are you talking about a new NNiD or...forum name...?
like the others said above me, you cant change your NNiD unless you make a new one.
just keep SinCara, its been your handle for some time now and im sure people know your name.
You can't change names. Names are set to your NNID... unless you create a new NNID account. I've been known as "Cal619Guy" since MWR. I'll NEVER change it!
I like my name, I am keeping it (if I get the game). I used to be Death (in red) in MWR, and I loved it. But MWR was a game of interesting names purposely made to sound good at the end of "killed by......".
i will be keeping the same name castiel because honestly i love the hate i get from the community when i beat them on hctdm =]