As we all know, a majority of the unlicensed games were released for the Famicom, but there were also pirate carts made for the Game Boy. Not surprising since neither has a lockout scheme like the SNES, SFC and NES. The unlicensed carts I know of were all made by Sachen, yes Sachen, the unlicensed porno FC cart people. These games are not "adult" though, just your standard GB fare. I don't know how good (or bad) these are. If you do, let me know. Remember, these are NOT pirates, they are actual, legal, original games from Sachen, whatever that is worth :)
Here is a Sachen 4-in-1, with Virus Attack, Electron World, Dice, Trouble Zone
This is another Sachen 4-in-1, which includes Pile Wonder (plays like Boxxle), Snake Roy (plays like the classic SNAKE BYTE for AppleIIe), Suleiman's Treasure (plays like Oil's Well, a classic computer game) and Puppet Knight (plays like another Bomberman game).
Sachen didn't just sell these carts in the US! They were also sold in Europe in the packaging below. The cart below has the games Street Rider, Vex, Trap & Turn and Duck Adventures.
