yea
no during naruto's battle with sasuke, sasuke kills the nine tail fox.
it really depends, when Naruto is in 9-tail unleashed trie kubi form, it's obvious who is stronger. However, if naruto is in a mini kuubi form, then sasuke will probably win (it has happened before) If naruto goes past one tail its over for sasuke.Well Sasuke can kill him before he turns in to the 9-tailand he can kill him when he turns in to the kubi because like said "All Uchiha Can Control A Kubi By Using The Mangekyo Sharingan Just Like When Madara Uchiha Controled The Kubi"And use the Mangekyo as Genjustu
Depends which arc you are talking about. Well basically you can't really explain it but for the first arc Sasuke is stronger and second arc Sasuke is still stronger. I personally thought Naruto would be stronger but the official databooks for both arcs says so. You can see some of them on narutopedia. source: databooks
no
Because if Naruto dies, so will he.
No Sasuke does not kill Pein
Itachi let Sasuke kill him or he could have killed sasuke
you get him by defeating 10 000 enemies or beating the boss rush
because sasuke is naruto's friend and he will never kill him
To answer your question. No Uchiha Sasuke does not kill Tsunade-Sama.
Naruto has yet to use Sage Mode against Sasuke. He unleashed four tails of Kyuubi when he fought him in the valley of the end, but that's about it. He hasn't actually met up with Sasuke since learning Sage Mode.
Sasuke does have the guts to kill former allies but decides not to.