> But I have a friend in Japan now.
> Is it better buy that here (compatibility with games, copiers...) or just do I buy one of the spanish ones?
> Regards
No, technically they're the same everywhere (even the same designs, unlike GBC). There's a special Pokémon-style GBA in Japan (available in "Pokémon Centers" only, according to this article), though... I don't really like that crapp, but the colour looks better than the four other ones IMO.
-- Matthias