This is a GameBoy flashcart that is most better, than BlUSB. That flashcart sucked. Anyways, being the best flashcart for GameBoy, either ways, it still isn't all that great, but there are good things, too.

This cartridge comes with a USB wire, and a mini CD, to use the extractor.

The extractor mostly sucks. You literally got to make a multicart, on a page, if you want to have multiple games. Otherwise, put 1 in each. And the cartridge, where do I begin? Well, it has alot problems with the GameShark (original GameBoy version), and the Super GameBoy. The cartridge also (I think) has a SRAM for the saving utility, but I've never tested it. Also, the cartridge is meant for GameBoy and GameBoy Color. The demo/test ROM, called "ADVENTURE.GB" is like a maze that has no rules, yeah VERY BORING. Yeah, not absolutely worth the $40 that I got it of.

GameShark bugs/glitches:
It almost reacts like, "Hey get this thing off-a me." Also, it will NEVER go to the first page, just only the second, with the GameShark.

Super GameBoy:
The music and sound does not play, but then all of a sudden, the music and sound worked.

Unfortunately, my original GameBoy was broken, so I never tested it on it, just the GameBoy Color.

By the way, I got the cartridge, brand new.

The product was made by Kitsch-Bent.

*update 6-23-13*
Whoa! Hold on! Wait! Whoa! Now it's playing the first page with the GameShark? *facepalm*  :facepalm:  This flash cart is SO messed up.