This is one of the
what seems like thousands of different Famicom
multi-carts released into the pirate market during
and after the 8-bit era.

The label says 32 in 1, and they didn't lie.
This 32 in 1 actually does have 32
different games on it. The programming of the board
was really poor, however, so many of the games don't
work properly, and often times no matter what game
you select to play some ninja game will start up
instead. One of the more unique characteristics of
this cartridge is that it has "Nintendo" carefully
molded into the plastic. Multi-carts rarely look
professional, but the manufacturers of this
cartridge did their best to pass it off as an
authentic Nintendo cartridge.
Expect to pay anywhere from $7 to $25 for
multi-carts, depending on the number of games
indicated by the label. This one was a lucky find at
only $3.
Here's the games list: