the four gold squares on the left side of the back mean they are %100 for sure real.
they can be easily seen on both the green and red games.
sapphire is real too pins are showing on back the front label is indented and the E is the right size.
so far the sapphire cart color seems way too light
I got mine from a retail store when it out, and its fairly dark in comparison
its a very dark blue/purpleish
the sticker also seems poor quality
it is definitely real, i have about 20 real and 30 fake pokemon sapphires in my room right here from various ebay auctions over the years.
it is metallic the shinyness fades especially in the dull blue color, in fakes usually the E is smaller and at the wrong angle. and fake ones you can't see the contacts from the back side. also the number 2 indented above the nintendo seal to the right of the copyright circle r thing.