I came across this unusual Famiclone at Omocha Souko the other day - the Mahjong Famiclone.
Mahjong is an old Chinese game played with tiles. I used to have a set, but I never figured out how to play it myself.
There are still some Mahjong parlors to be found here and there where the game is played (usually for stakes). I ride past one on my way downtown sometimes. Most of the ones I have seen are tiny little establishments in hole-in-the-wall places that look like they are run by shady characters.
It isn't just a gambling game though, people play it at home as well and it seems to be popular among a segment of the oba-chan set.
Anyway, I found this thing kind of funny. It was only 780 (about 9$) but I didn't buy it. According to the box it has a built in Mahjong game and can also be used with regular Famicom carts.
Interesting too is the note on the left of the cover which says it is for those "aged 12 and above."
-Pachinko and the Famicom: AKA The Stupid Side of Japanese Gaming