Naruto: Gekitou Ninja Taisen! 4 (Import) Cheats & Tips

To unlock characters, you must unlock the Mission Mode, which requires you to beat Story Chapter 1 and to unlock Missions. Here are the characters and the number of Missions.

Sakon---5
Tayuya---10
Iruka---15
Mizuki---20
Akamaru---25
Kimimaro--30
Karasu---35
Haku---40
Zabuza---45
Anko---50
Itachi---55
Orochimaru---65
Tsunade---75
Sarutobi---85
Awakened Hinata---100
Sasuke-CS2---120

These last 3 require us to do the S-Rank Missions called Strongest Rival.
Kisame---Strongest Rival - Gai
Kabuto---Strongest Rival - Tsunade
OTK Naruto---Strongest Rival - Sasuke-CS2

NARUTO Gekitou Ninja Taisen! 4 (Japanese)
(m)
TTAG-XMXG-07F13
TK8V-H256-2YCF8

Everything unlocked
MCWZ-BNUJ-XUMFQ
8PEE-9QN4-WC04V
KTT5-MG0G-NG2U1
7CKZ-WD7C-48B83
CCYB-4FTD-JZ3C1

These codes works I've tested them