This is a CIB Tetris minuet!!
If you ask yourself what a "Tetris minuet" is, let me explain:
The Tetris for the Gameboy has 2 variants:
1. The "Tetris minuet" variant. (v1.0)
2. The regular international version. (v1.1)
The differences are that the minuet variant is the first version of the game, as seen above, it was Japan only, has a different Type-A music (hence the name "Tetris minuet" comes from), a different level - up jingle and other minor differences described here.
The minuet variant comes with a big box and a link cable inside, compared to the international version that comes in a small box and without link cable (not my picture).
The minuet variant only sold ~25,000 copied before it was replaced with the international version, so it's pretty hard to come by, and especially with a big box.
So this is everything I wanted to share, thanks for reading and have a nice day!!