(2) shows the Nintendo logo, which always has a TM after it in. In the image, (1) shows the join at the back of the cartridge, if its neat and barely visible, the game is all good, however if its shabby and obvious, it suggests a fake.
In the original carts that screw is a very peculiar one, that needs specific screwdrivers in order to unscrew it. The indicators on the back are more subtle, but more likely to indicate a games questionable authenticity. Nintendo Screw Original / Fake Gameboy Cartridge Screw On the back of the cart u can see the screw that holds the front n back sides together. The Cartridge The cartridge color will correspond to the name of the game. The actual cartridge board will say a year and Nintendo imprinted on the board. The sticker may say that its a Gameboy Advance game although its on a gameboy cart 3. I watched a video recently where, sadly but very true, official gameboy, gameboy color and gameboy advance games are being faked, bootlegged or what ever you want to consider you are probably seeing a bunch of fake game-paks that someone has made, NOT Nintendo. Fake labels are usually off-center from the cartridge and/or have overly rounded corners. Just look at the difference in the above photo - the game board was a real & a Fake Chrono Trigger. Identifying Fake GBA GamesOne of the worst things you may encounter when buying online (And sometimes in a store) is the fact that you'll buy a. "UTF-8" a,abbr,acronym,address,applet,big,blockquote,body,caption,cite,code,dd,del,dfn,div,dl,dt,em,fieldset,font,form,h1,h2,h3,h4,h5,h6,html,iframe,ins,kbd,label,legend,li,object,ol,p,pre,q,s,samp,small,span,strike,strong,sub,sup,table,tbody,td,tfoot,th,thead,tr,tt,ul,var. - The easiest and most sure fire way to spot the fakes are the internal board.