The following are known Action Replay Codes for Glory Days 2 on Nintendo DS (NDS).

Game ID: YG2E-23FA7FBA

Infinite Lives
22254e18 00000004

Infinte Bombs
22246160 00000099

Infinite AA Missiles
22246164 00000099

Infinite Special Weapon
22247b8c 00000004

Infinite Cash
12247b78 00000630

Press SELECT+UP for 99 Civilians On Board
94000130 ffbb0000
22246152 00000099
d0000000 00000000

Press SELECT+DOWN for 0 Civilians On Board
94000130 ff7b0000
22246152 00000000
d0000000 00000000