The codes should work with the region specified but may work for other regions as well.
Device Compatibility: Action Replay, CodeBreaker & GameShark
Infinite Health Zack
801090080005
Infinite Bombs
d0108d000002
80108d000003
Invincible (Zack and Hannah)
800cdfb000ff
Press X and Square To Hover
d210c21a4fff
800cde3e0000
Press Select and L1 For Blue Key 1 In Slot Nine
d010c21afbfe
800ce2a60001
d010c21afbfe
800ce2a60030
Press Select and L2 For Round Key In Slot Nine
d010c21afefe
800ce2a60001
d010c21afefe
800ce2a60003
Press Select and R1 For Yellow Key In Slot Nine
d010c21af7fe
800ce2a60001
d010c21af7fe
800ce2a60004
Press Select and R2 For Blue Key 2 In Slot Nine
d010c21afdfe
800ce2a60001
d010c21afdfe
800ce2a60005
Press Select and Triangle For Red Key In Slot Nine
d010c21aeffe
800ce2a60001
d010c21aeffe
800ce2a60006
Press Select and Circle For Green Key 1 In Slot Nine
d010c21aedffe
800ce2a60001
d010c21adffe
800ce2a60007
Press Select and X For Blue Key 3 In Slot Nine
d010c21aebffe
800ce2a60001
d010c21abffe
800ce2a60008
Press Select and Square For Green Key 2 In Slot Nine
d010c21ae7ffe
800ce2a60001
d010c21a7ffe
800ce2a6002f
Press Select and Up For Yo-Yo In Slot Nine
d010c21aeffee
800ce2a60001
d010c21affee
800ce2a6002a
Press Select and Right For Flying Disc In Slot Nine
d010c21aeffde
800ce2a60001
d010c21affde
800ce2a60029
Press Select and Down For Alarm Clock In Slot Nine
d010c21aeffbe
800ce2a60001
d010c21affbe
800ce2a6003f
Press Select and Left For Shoes In Slot Nine
d010c21aeff7e
800ce2a60001
d010c21aff7e
800ce2a6002c
Press Select and Start For Warp Marble In Slot Nine
d010c21afff6
800ce2a60001
d010c21afff6
800ce2a60037
Press R1 for DreamDew (Zack)
d010c21af7ff
800cdfb40404
Press R2 for DreamDew (Hannah)
d010c21afdff
800ce1c80404
200 Bugs
80108d9600c8