So this game is pretty much the best game on DS that's not a Castlevania. I am a newcomer to the Advance Wars series but man, it's pretty cool. It actually seems kind of inspired by Total Annihilation in terms of unit types and the way it's geared more towards positioning, unit roles, and production rather than the rock-paper-scissors Starcraft balance thing. It's actually a pretty deep game and there seems to be a huge amount of content. There are loads of missions, optional missions, an extensive story with a lot of cutscenes, over 100 maps to skirmish on, a map editor, and Wi-Fi play. And this music is pretty cool! I'd definitely suggest picking this up.
Once I figure out how to find the friend code I neglected to write down, I'll share it and maybe we can have some intense and mysterious battels.