I have about 5 sealed copies of Metal Gear Solid for the Game Boy Color.
Looking for SNES games like Chrono Trigger, Captain Commando or Havest Moon.
These are were a brazilian release I got from a guy who used to work at a store that sold these back in the day and sold all of his old stock.
They are 100% authentic, sealed in box and also play IN ENGLISH. A family friend, who lives in Brazil sent them to me.
If the front sticker that's on the plastic film bothers you, I have 2 or 3 copies that didn't came with it. That is just the official company who imported it, which still operates nowadays but with newer games, of course.
See the below pics of it, with 1 of them being unboxed by me, for my personal collection