From what I see it looks nothing like the US version, or any released version. looking at
gamefaqs.
That's really strange. it has to be a bootleg.
Here is a nice side by side for you
Front

Back (I included the UPC code he listed in the description as well)

I cant wait to see what the cart looks like, if you reside to open it. The differences are there. The ERSB rating, colors, the nintendo logo on the front bottom right, missing the WIFI logo. The backs completely different with a code that matches nothing.
I hope this helps in your case.