The following are known Action Replay Codes for Lost Magic on Nintendo DS (NDS).

Game ID: AM9E-168BEED4

Press Select In Battle For Max EXP
92102b04 00000004
1219b280 0000270f
d0000000 00000000

Debug Test Event (Press Select while loading a save)
a4000130 fffb0000
0209487c e1a05000
d2000000 00000000
94000130 fffb0000
0209487c e3a05017
d2000000 00000000