The following are known Action Replay Codes for Classic NES Series: The Legend of Zelda II: The Adventure of Link on Nintendo Game Boy Advance (GBA).
These codes were also known as GameShark Codes and in most cases will work on both devices.

These codes are for the U.S. version of the game.

Master Code – Must Be On
18cc1128
421c13ae
2f60f977
f2041b77

Infinite Health
bf292953
3342474a
d597c433
c6f1947f

Infinite Magic
44e9f29a
fdef8d78
e271b8e9
b006c172

Infinite Lives
44078b46
3e13d851

Press R: Level Up
3bc4cce5
cf28934b
dbdd7f0c
d9a9bbbb
cf275bdb
34eb841e

Invincible
0d97907c
101abc6f

Super Jump
2d9261df
c10acf75
8825c50b
c1e271b2

Infinite Keys
5b14e8e6
902f1dbe

Max Life
7dcce921
f0fd2152

Max Magic
d49c5e1c
329533b5

Max Attack
e8b9b8e4
ccc5c35a

Have All Spells
e1219efb
91d8ab5e

Have All Items
faa77eae
5e44d212

Never Slow(On Map)
f3135214
135222e1

Map Enemies Vanish
ecd60c9f
71efde0c

Have Shield Spell
abab5479
c6150760

Have Jump Spell
03b45bfe
7eec51ae

Have Life Spell
dbecc0ee
c1dffe8f

Have Fairy Spell
33f8867c
db9c8290

Have Fire Spell
6fd5e0d4
ebf9568f

Have Reflect Spell
4168eb5b
c517e0d8

Have Spell Spell
db69a603
dbf905df

Have Thunder Spell
f8061e4b
490c7c34

Have Candle
2bb22771
2ff817d7

Have Power Glove
cf1bf69d
a8711273

Have Raft
1835155d
f737603b

Have Boots
107a1168
6c46c189

Have Flute
024afe70
f12ff4db

Have Cross
f22be810
05e97995

Have Hammer
122637d3
01465a1f

Have Master Key
b041f8d3
2b516cde