60 to 72 pin converters hidden in NES games.

[Zoo]

Some NES games have famicom to NES converters, with an NES and Famicom board in them. Because they had to make a lot of games in a limited amount of time, to save time they made NES games out of old Famicom games. Meaning that there are converters in some of my game. So now I can get famicom games! YAY!

[Gan]

What are famicon games?

[Zoo]

Japanese NES games.

[Connors]

That is cool I wonder if my friend knows about it, he collects games too.

[Circuit]

That's neat.  So basically, you would take a converter from one of your American game cartridges, and put it into a Japanese one?

[Zoo]

No, I'd take the current famicom game out of the NES cartridge, store it somewhere, and take the guts of a different famicom game and put it in the NES cartridge with a converter. It still needs to be in the shape of an NES cartridge, or I can't take it out of the system, because I only have a front loading NES.

[Connors]

I wonder how difficult it is to get your hands on one of these...
http://www.stupidfingers.com/projects/nintoaster/

[Zoo]

The AVGN has a Nintoaster. I like this guy's Nintoaster better, though.