The following are known Atmosphere / EdiZon / SXOS Cheat Codes for ACA NeoGeo: Metal Slug 3 on Nintendo Switch (Switch).

Title ID: 0100BA8001DC6000
Build ID: 51b72bba4010216e

[hit anywhere]
021F0000 8791AB40 00006002
021F0000 8791AB64 00006008
021F0000 8791AB72 00000092
021F0000 8791A982 00006002
021F0000 8791A9A8 00006002
021F0000 8793EF8E 00005988

[P1 Infinite Ammo]
02000000 01268892 0000FFFF

[P1 Infinite Bombs]
01000000 0126888C 000000FF

[P1 Infinite Lives]
01000000 0125A052 00000009

[P2 Infinite Ammo]
02000000 012688A0 0000FFFF

[P2 Infinite Bombs]
01000000 0126889A 000000FF

[P2 Infinite Lives]
01000000 0125A102 00000009

Title ID: 0100BA8001DC6000
Build ID: c8e562fa3fff01a3

[Invincible]
010F0000 01239D80 00000010

[Moon Jump]
80000002
040F0000 01239D30 9AAA0007
20000000