Super Mario Land 6 Golden Coins Nintendo Gameboy Japanese Import Cartridge Only.
Cartridge Only.
Made in Japan.
Game is in working condition and has been tested. 
Game is a little dirty.
There are some color changing spots on the back.
I played these several years ago and have hundreds to add online and can't remember which ones had English language in the actual game and which ones were fully Japanese so the game may not be in English.