I will but i guess i have to advance in pokemon black story right now im in driftveil city. Other than that the game really seems legit but i needed the confirmation from more experienced people.
if the sticker is not pixelated, i can tell you the shell is legit, it has the exact same plastic and exact same colour
as for the pcb, there is no glue on it, it even has the nintendo logo wich is not needed ( why would a counterfeit copy have the nintendo logo inside the case? its not visible outside, and the DS games are a bit hard to open (on the old cartridges you just had a screw) there is no reason someone who would print a nintendo logo inside a shell that probably will never be opened, specially with gold paint...
as like user above me said, diferent brand chips can be used (the 3ds nand being an example) this is what its called a revision of hardware, little changes\improvements that are made.. lots of times to reduce cost...
there is another case.. you can have a reburshed cartridge... it can be a cartridge that come out from the factory with a faulty memory.. then it was sent to nintendo repair center... and that type of chip is the ones they have available there...
this is what a counterfeit looks like:
Notice the black circle, and no nintendo logo, there is no use of a nintendo logo printed inside)
(left fake, right real)
also, this is not a pokemon game... but i had a fake pokemon gold for gbc, and it also had the black circle thing and weird looking