What is this?

Can anyone tell me what this is? Gameboy?? I have had it a long time and cant find anything on it.

http://s1109.photobucket.com/user/mightysubzero/library/unknown gameboy adapter?sort=3&page=1

 

Looks like a GameShark to me.
http://gamehacking.org/w/images/a/af/GameSharkFirstModel_GBA_cartridge.jpg

 

Yes, Looks like a GameShark with the front protector removed.

 

Great.. Thanks for the Info.. I have had this thing so long.. And have asked a few of my friends. But couldn't find anything on it..