The following are known Action Replay Codes for Castlevania: Dawn of Sorrow on Nintendo DS (NDS).

Game ID: ACVE-9A6B468A

Infinite Health
120f7410 0000270f

Max Health
120f7412 0000270f

Infinite Magic
120f7414 0000270f

Max Magic
120f7416 0000270f

Max Experience
020f7448 002dc6c0

Max/Infinite Gold
020f744c 000f423f

Very Low Game Time
020f703c 00000060

Library Complete
020f71ac ffffffff

Have All Weapons
d5000000 99999999
c0000000 00000009
d6000000 020f71e0
d2000000 00000000

Have All Armor
020f7208 99999999
020f720c 99999999
020f7210 99999999
120f7214 00009999
220f7216 00000099

Have All Accessories
d5000000 99999999
c0000000 00000008
d6000000 020f7207
d2000000 00000000

Have All Items
d5000000 99999999
c0000000 00000008
d6000000 020f71bc
d2000000 00000000

Have All Souls (including ability)
d5000000 99999999
c0000000 00000004
d6000000 020f70d0
d2000000 00000000
120f70e4 00009999
220f70ea 00000090
d5000000 99999999
c0000000 00000003
d6000000 020f70ec
d2000000 00000000
d5000000 99999999
c0000000 00000004
d6000000 020f70fc
d2000000 00000000

Enemy Database Viewable
020f7150 ffffffff
020f7154 ffffffff
020f7158 ffffffff
020f715c ffffffff

Enemy Database Complete(100% Soul)
020f70d0 99999999
020f70d4 99999999
020f70d8 99999999
020f70dc 99999999
020f70e0 99999999
020f70e4 00999999
020f70e8 99900000
020f70ec 99999999
020f70f0 99999999
020f70f4 99999999
020f70f8 99999999
020f70fc 99999999
020f7100 99999999
020f7104 99999999
020f7108 99999999
020f710c 99999999

Moon Jump
94000130 fffd0000
020ca96c ffffb1d5
d2000000 00000000
Only works on Default button mapping.

Kill Boss’ with 1 Hit (Boss Rush Mode)
0219ae00 00000000
020d2988 00000000
020d2c28 00000000

Unlock All Characters, Boss Rush & Sound Mode
0210aa88 008f7f7f