Is the Game Boy Advance slot on the DS region-locked?

Question

Would I be able to play an American Game Boy Advance game on my European DS via the GBA slot at the bottom of the device?

I know the on the whole Nintendo don't region-lock their portables (at least before the 3DS came out) but I just want to be 100% sure.

Answer 1

It is not region-locked. I've played European, North American, and Japanese games on European and North American DS / DS Lites.

GBA-esque DS addons like the Daigasso expansion pack, paddle controller, and rumble pack are also not region-locked.