There are no cheat codes for Lego Battles on Nintendo DS, including a "Queen" code. The game is designed around strategic army building and tactical combat.
Tips to Win Without Cheats
Experiment with Unit Compositions: Each unit has strengths/weaknesses. Mix armies to counter opponents.
Use Terrain: Obstacles, high ground, and chokepoints can turn battles.
Upgrade Consistently: Unlock and upgrade units as you progress.
Learn from Losses: Analyze replays or rethink strategy after defeats.
The real fun is overcoming challenges through your own skill. Enjoy the strategy!