Japanese Nintendo DS region free? for GBA titles too?

[wonderpug]

So Advance Wars DS has finally broken my will and I've decided to buy a DS.  The thing is, in about a month I'm going to be visiting Japan for the first time and I was thinking about picking up one of the colors that isn't sold in America.

Is it true that Nintendo DSs are all region free, so I could play US titles on a Japanese DS without any problem?
Does "region free" include GBA titles? Would I be able to play my USA-purchased GBA (not DS) games on a Japanese DS?

[The Grue]

I don't believe there are regions with the GBA games.

[wonderpug]

Awesome.  Graphite black, here I come!

[Tebunker]

yeah all Nintendo portables are region free.

[PaulBot]

The one thing you'll run into is your users manual will be in Japanese. Just chuck it in the trash - you don't need it.

[wonderpug]

What about the power adapter?  Do you know if I can safely ignore the difference between 120V and 100V? Or will I always need to use an adapter when I get back to the States?

[The Grue]

I ported the black GBA SP back in the day and I was able to use that adapter just fine.  Not sure about the DS, though.  Maybe someone else can speak to it.