The following are known Action Replay Codes for Shin Megami Tensei: Strange Journey on Nintendo DS (NDS).

Game ID: BMTE-73CE7171

Infinite Money
02214620 05f5e0ff

CHARACTER SLOT 1 (IN BATTLE) CODES:

Infinite HP
6222be84 00000000
1222be88 000003e7
d2000000 00000000

Max HP
6222be84 00000000
1222be8c 000003e7
d2000000 00000000

Infinite MP
6222be84 00000000
1222be94 000003e7
d2000000 00000000

Max MP
6222be84 00000000
1222be98 000003e7
d2000000 00000000

CHARACTER 1 STAT CODES:

Max HP
122142ee 000003e7

FULL HP
122142ee 000003e7

Max MP
122142f0 000003e7

Full MP
122142fa 000003e7

Max ST
222142e8 00000063
222142f2 00000063

Max MA
222142ec 00000063
222142f6 00000063

Max VI
222142e9 00000063
222142f3 00000063

Max AG
222142ea 00000063
222142f4 00000063

Max LU
222142eb 00000063
222142f5 00000063

ITEM CODES:

99x All Expendables (Press L+R)
94000130 fcff0000
d5000000 00000063
c0000000 00000038
d8000000 0221468f
d2000000 00000000

Key Items (Press L+R)
94000130 fcff0000
02214680 007fffff
02214684 fffffff3
02214688 e7ffffff
1221468c 0000bfff
2221468e 0000003f
d2000000 00000000
Note: Be careful using this code as it can have undesired effects.