Yes. DS games are not region locked.
Yes, they do since Nintendo DS games are not region locked
Yes. The DS lite is not region locked, a Japanese model will play DS games from the US.
Yes, since Nintendo DS games are not region locked, the Japanese DSi can play North American games. The Japanese DSi is not physically different than the North American DSi so accessories will work as well.
Yes
If it is a Japanese Gamecube, then do you think it can play Japanese Gamecube games?
i tried it and i cannot play Japanese games, im still looking for a solution.
Japanese games can play on American consoles, vice versaONLY.
No.
Most consoles are locked into different regions and an American console would not work on a Japanese console. However, an oversight from Nintendo allows an American gameboy to work with Japanese games. Yes.
Yes, but most games are only in Japanese. so if you know Japanese go for it!
Yeah, theres no region lock on DS's
Yes.