The codes should work with the region specified but may work for other regions as well.
Device Compatibility: Action Replay, CodeBreaker & GameShark
Player 1 Infinite Lives
80176B18 0003
Player 2 Spits fire-balls
80176AEE 011F
Infinite Lives (rainbow island)
8005DB7C 0015
8005DC3A 0003
Invincible + flashing
015083C4
01001DD3
01001ED3
01001FD3
Player 2 Infinite Lives
80176AE8 0003
Infinite Lives
01054DC0
Floating Enemys. Turn the code off to pop them
010205D3
010209D3
01020DD3
010211D3
010215D3
010219D3
Player 1 Spits fire-balls
80176B1E 011F
Invincible + invisible
015083C4
Player 1 Invincibility
80176B1C 0100
30176B30 0000
Player 2 Invincibility
80176AEC 0100
30176B00 0000