There are 37 codes for this game.
NOTE: These codes require Action Replay MAX

(M)
N93R-XH7F-3TAZ0
8EDV-688J-8Q9TD

Infinite Gold
M3JJ-EMGP-AM882
W59K-9VHZ-NU1UN

Infinite Time-PowerUps
J1ZN-17RJ-NZQRB
PNHR-P9AN-P50YB

Quick Level Up
F16X-W0VC-WEMCV
APNA-5P9K-N2W1F

Player 1 Codes
RBZV-XHVV-9V4KA

Max Health
8V16-WURX-2D1D5
WAZP-1V4X-8RQFR
3MJF-QF75-ABP4M

Infinite Health
RZZK-Z5JH-P2B5U
UDU7-2477-NVP3A
7Y9N-23VR-TMPNQ

Max Musou
1F14-CW07-5RQWV
8W4F-3W4Y-213FU

Infinite Musou
CCJ9-8Q6T-3T8GZ
T1YU-DW1G-30DGP

999 Kills
2R97-BJ0H-8UC0G
WJNM-E8FU-9M21B

9999 Kills
GK1D-DUYC-RZ7VF
92Z3-R4YB-MP667

All Characters
MVX4-Y59Y-41MD6
3YET-WD1K-KK3K2

Character Cleared Codes
DJUZ-QB8H-4MG61

Yukimura Sanada
88BH-79NV-3TY2Z
XVHX-XANF-5HRMT

Keiji Maeda
V300-92ZF-0U1VF
7YG2-EATZ-P5JK3

Nobunaga Oda
W9TN-UBJZ-J7HBR
ZDW3-WT9X-CPMKD

Mitsuhide Akechi
JDGJ-TUEA-D9T3W
U0W7-JE2Z-F6EVZ

Kenshin Uesugi
BAC7-PGZ3-78RU6
PM13-79CF-YUN61

Oichi
8PRK-RKXM-WJTZW
HMM6-11AK-PZ5JK

Magoichi Saiki
B7ZW-AVXZ-VFTEP
HGVJ-B54G-T472F

Shingen Takeda
QRD8-82M0-AZW3M
G0VU-44QJ-8MGJ5

Masamune Date
D8F2-U3V4-YDYAY
KFZM-R35B-4BKT1

No
QUFX-G5UT-0ZMZY
4AM1-DE49-7RY65

Hanzo Hattori
6CDG-A5Z9-5X620
D50Q-MKHD-WPNFM

Hideyoshi Toyotomi
BRVB-C4RU-XAKKX
W3K6-X0MD-K68HN

Tadakatsu Honda
GFA2-2E9D-CKWPX
Y4YK-GXF0-MHHT0

Ina
TRQ4-EPJ8-TVBBQ
9JPC-M8T2-W0MMN

Ieyasu Tokugawa
B0H2-W8CX-M4UB1
059D-J7D1-8F256

Mitsunari Ishida
1J1A-UH0W-Y1WQ0
EQTV-YRNZ-FH31Z

Nagamasa Azai
JFWT-AVT6-E1FY1
PQQN-077H-EEP2F

Sakon Shima
9ZG2-QP63-D3VFK
6353-9DCH-XK1XT

Yoshihiro Shimazu
U2X5-7FBY-2XHT5
DK1U-QN80-VWWT2

Ginchiyo Tachibana
3KJ2-RC1Y-D6F5Q
M3KX-884Q-T8YG2

Kanetsugu Naoe
TKWC-3NMZ-E1YTA
T4JK-VR57-ZEDPJ

Nene
6XGE-36VQ-Z25FQ
T83P-BT1T-814M0

Kotaro Fuma
CDJU-2XBK-VHBKP
KBVB-RYM3-DUNNP

Musashi Miyamoto
U1MM-CVWU-75YCG
BWR0-CX8K-6UFAN

Courtesy of CodeJunkies