I need some help

I really want a good adventure game on the DS...
but not RPG

legend of zelda: phantom hourglass is believe is an adventure game. your can do a search on gamespot for all ds games of adventure genre. or go to the search here and look for the adventure genre for the ds by rating or by whichever topic you want.

Try these..
-Overlord Minions
-Puffins: Island Adventure
-Mystery Stories
-Jake Hunter Detective Story: Memories of the Past
-Space Camp
-Night at the Museum: Battle of the Smithsonian
-Secret Files 2 - Puritas Cordis
-X-Men Origins: Wolverine
-Broken Sword: Shadow of the Templars - The Director's Cut
-Dawn of Discovery

can japanese games be played on us nds?

yes

Flower, Sun, and Rain is amazing, but very trippy.