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hinata's sister is not in naruto shippuden ultimate ninja storm 2
You can find this PS3 game in most good stores or on websites such as Amazon.com and Play.com
Virgin megastore in Mall of the emirates, geekay games etc.
One may find out how to unlock the Edo Kage in Naruto Ultimate Ninja Storm 3 by looking up game forums on the game. Another way would be to purchase the book on the game from your local game store.
there are armor destroying arrowhead in naruto shippuden ultimate ninja storm 2 but you can not use them they can only be traded into a tool shop to get new equipment for your character to use in only battles
He is At the top of the hokage's tower in the hidden leaf village
materials such as that can be found in the brownish barrels.
At a store???
Find the "Ichiraku Ramen" bar and go directly east and look for a green dot on the map.
All the ninja storms and ultimate ninja 3 and 5.
Go behind the hidden waterfall next to the stone cottage.
I know that Naruto ultimate storm 2 is sold at Target, Walmart ,Gamestop ,Best Buy and others places but i think you should be able to find the game in at least one of those places.