regarding about the sixth weapon or somethin like that Sengoku Musou 3 Z Special
You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
If you go to the FAQ for the PS3 version (Sengoku Musou 3Z), it explains how to get the weapons and what stages you get them on (they're called 'rare 2' in the FAQ). They're the same requirements for this version.