The following are known Action Replay Codes for Metroid Prime on Nintendo GameCube (GCN).

These codes are for the European version of the game.

Master Code – Must Be On
0TZA-TQMF-XY6MB
4GEF-YRJ6-9BCJC
B33T-BJ8E-DAKUM
VUYB-0ECB-P3CUH
E9FZ-A3QA-YCERP
UWAR-ZVWJ-9MQ3A
A1EN-R5CT-9AYTP
ECZQ-827T-WUCPE
E9FZ-A3QA-YCERP

This code must be on
DKZP-GETA-T5K3U
9MRY-J35Y-Q0YCM
3FUA-M5P6-PRC5N
BQGQ-V5QE-CU0M5
EM4H-V8VH-96DCY
HFYZ-ZKF9-HH8D7
This code must always be turned on for the Item codes to work

Infinite health
11E8-Z4FM-47XR0
999D-Z5J1-Q08NW

Infinite missiles
KBAR-32F9-643VJ
X0QU-WCU2-X6GGR
EU7Z-X40A-WRB1H

Infinite Powerballs
FKB1-H3T6-5AARV
PFJA-9AZ3-66X48

Moonjump (Hold B)
XBQN-6QB0-1QPXT
NTBW-D22D-2YZB1
25DB-G0PG-F38FD

Play NES Metroid
VEQF-MUET-XBDTB
4ZCH-EY4C-H3F3V
2198-8G5Y-HF0ZQ
NP7J-M6RG-46P72
YXPZ-AMAU-VCFNH
Press L X at bonus screen To Exit hold L Y while quitting

Crazy Controls
U8KE-UP0X-RGFCK
TTY7-0M36-PE50P

Arm Cannon Codes
KM27-NGG6-V7W55

Have Ice Beam
Y414-A52D-QVH4V
2W3P-AP5C-6NQW9

Have Wave Beam
XG2V-X613-UGNAR
6TG9-KY0N-WQJVD

Have Plasma Beam
699T-AUJJ-97XCK
XV06-20B5-RFREN

Have Phazon Beam
9X80-ANKR-CCPMM
V8QQ-KCG5-88E8E

Morph Ball Codes
GEY9-ATY5-9YKRV

Have Morph Ball
K9TK-92PZ-VPQVD
4FDR-DVY1-J3M30

Have Boost Ball
BREV-GGKP-25583
HFRJ-7Z00-PNRCM

Have Spider Ball
ARNZ-42K8-63QPG
M9MQ-Q1HJ-3KT73

Have Morph Ball Bomb
VXVG-4JE7-8Z3Q9
09Q5-ER4B-0C385

Have Power Bomb
XJH7-G0EW-14GFZ
3NMM-AE9A-GRXAE

Suit Codes
7FB9-N030-BN63W

Have Varia Suit
PY5A-AJG5-TJ877
UPR3-JR6M-V6FP4

Have Gravity Suit
443U-V974-FW8R2
9PFY-M20E-86MP1
0R3B-P9CC-7K5U1

Have Phazon Suit
XAA6-294W-JBYJF
V8QQ-KCG5-88E8E

Visor Codes
M13T-C09E-FV3H1

Have Combat Visor
EXTE-BANA-5HAH4
MEJA-1RRY-R11TD

Have Scan Visor
D5VG-NT94-JNK3W
NVFQ-XE1U-QB4XV

Have X-Ray Visor
3A0T-W56T-BQYB8
MAJG-PFB1-EPMGK

Have Thermal Visor
Y4N1-JHPR-KFDV3
U5DM-U2EB-DEAX5

Secondary Item Codes
EB83-QU8B-6D8GK

Have Space Jump Boots
BX3E-ZA50-97UYU
BFGE-0U8Q-NAJ2B
P3AB-BT89-JBH8Z

Have Grapple Beam
996F-GZZD-8B90R
EK4M-AE5V-J5MAX

Have Missile Launcher
37GH-CJ6B-F0T50
KCK6-JMHN-V3YXK

Have Charge Beam
GZU1-YUGM-NBT5D
X929-KAT2-1C34F

Have Beam Combo A
G1WN-T1RT-D2D2B
H06A-RB2U-XVJVW

Have Beam Combo B
MH8V-06U9-RVDBC
PA3H-FMPR-WM3G6

Have Beam Combo C
HPDB-XDCW-UQG8Y
MUHY-RMAH-ZTXGC