Mario 10 is
one of the more fun hacks in the Mario series. The
reason is simple: Mario's head and body are huge,
and that means the hackers actually had to work to
make them that way.
The game that enlarged Mario was hacked into is
Jackie Chan.
This is the only game in the Mario series (that I
know of) where Mario is vastly unlike how he appears
in Super Mario Bros. 3.

The label graphics tell you this is a recent pirate.
This cartridge is called Mario 10, but the
game also has the alternative name "Kung Fu Mari".
Hackers often renamed Mario to "Mari," likely for
copyright reasons, even though the images clearly
show Mario.

Mario 10 is also called "Kung Fu Mario".

Mario is kind of sexy.

The level map on which a little Mario travels.

An enemy in pink and a green flying fish.
The gameplay in Mario 10 is smooth, and
for that reason, it's fun to play. This pirate would
be worth some decent dollars if sold at auction.
This certainly is my favorite those I've discovered
in the Mario series.