Advance Wars: Dual Strike Codes -

Hidden map:
Hold L and R when selecting Map Design mode to display a map with terrain that spells "Advance Wars".
Also, there are two groups of buildings at the bottom of the hidden map. The orange buildings make the orange star symbol, while the blue buildings make the blue moon symbol.

Bonus COs:
Adder (costs 1,000 points): Win mission 26 in normal campaign mode. 
Candle (costs 3,500 points): Win mission 26 in normal campaign mode. 
Chakka (costs 3,500 points): Win mission 26 in normal campaign mode. 
Flak (costs 1,000 points): Win mission 26 in normal campaign mode. 
Grimm (costs 1,000 points): Win mission 20 in normal campaign mode. 
Hachi (costs 2,000 points): Complete normal campaign mode with an overall "S" rank. 
Hawke (costs 1,000 points): Win mission 26 in normal campaign mode. 
Javier (costs 1,000 points): Win mission 20 in normal campaign mode. 
Juggler (costs 3,000 points): Win mission 26 in normal campaign mode. 
Kindle (costs 3,500 points): Win mission 26 in normal campaign mode. 
Koal (costs 3,500 points): Win mission 26 in normal campaign mode. 
Lash (costs 1,000 points): Win mission 26 in normal campaign mode. 
Sturm (costs 5,000 points): Unlock all other COs, their color edits, and earn all 300 medals. 
Nell (costs 2,000 points): Complete normal campaign mode with an overall "A" rank. 
Sasha (costs 600 points): Win mission 20 in normal campaign mode. 
Von Bolt: Complete hard campaign mode. 
Zipo (costs 3,000 points): Win mission 26 in normal campaign mode. 

Battle Map Shop bonuses:
Insert either Advance Wars or Advance Wars 2: Black Hole Rising into the Game Boy Advance slot on your Nintendo DS before powering up. Once in the game, go to Hachi at the map shop. He will comment on your taste in games and will have a new wallpaper that will cost 1 credit, which may not otherwise be available in the game.


Advance Warpaper (costs 1 point): Have the Game Boy Advance game Advance Wars inserted. 
Advance Warpaper 2 (costs 1 point): Have the Game Boy Advance game Advance Wars 2 inserted. 
Hachi's Land map (costs 1 point): Have the Game Boy Advance game Advance Wars inserted. 
Lash's Land map (costs 1 point): Have the Game Boy Advance game Advance Wars 2 inserted. 
Nell's Land map (costs 1 point): Have the Game Boy Advance game Advance Wars inserted. 
Strum's Land map (costs 1 point): Have the Game Boy Advance game Advance Wars 2 inserted. 

Other bonuses:
CO Edit: Reach level 10 or higher with a CO. An alternate costume option is in the CO Edit menu. 
Gallery (costs 2,000 points): Complete normal campaign mode. 
Mistwalker: Complete hard campaign mode. 
Oozium (costs 1,000 points): Win mission 22. 
Soul of Hachi: Complete hard campaign mode. 
Soundroom: Complete normal campaign mode and buy everything from Hachi. 
Wallpapers: Complete campaign to unlock wallpapers for the three COs used most in that campaign at the Display menu. Get all 300 medals to unlock the final wallpaper. 

Gallery images:
Complete the indicated task to unlock the corresponding gallery images. Note: Images 1 through 28 are already unlocked by default.

29. Rachel's Hat: Watch the Mission 9 ending. 
30. Toast: Watch the Mission 22 ending. 
31. Party 1: Watch the Mission 22 ending. 
32. Party 2: Watch the Mission 22 ending. 
33. Handshake: Watch the Mission 22 ending. 
34. Dismissed!: Watch the game's ending. 
35. Report: Watch the game's ending. 
36. Promise Hill: Watch the game's ending. 
37. Flowers: Watch the game's ending. 
38. Three Villains: Watch the game's ending. 
39. Original 7: Select "Yes: after the last mission. 
40. Salute: Select "No: after the last mission. 
41. Drive: Successfully complete campaign mode under the hard difficulty. 

Hard combat mode:
Successfully complete combat mode to unlock the hard combat difficulty for purchase from Haichi.

Brutal combat mode:
Successfully complete hard combat mode to unlock the brutal combat difficulty for purchase from Haichi.