I found this gem in my box of duplicates while cleaning out the basement.  I'm a cart only collector so this copy is going up for sale.
 

NES Zombie Nation CI​B

 

 

More Finds From The Duplicate Box

NES TAGIN DRAGON

NES THE LION KING PAL A Box and Manual Only

 

NES Aladdin PAL A Box and Manual Only

http://www.ebay.com/itm/141971200064

Lot of 3 NES Games Mickey's Adventure In Numberland, Monopoly, Yoshi's Cookie
http://www.ebay.com/itm/141971996022