There are 4 SKOB games:

1. Shining Soul

2. Digimon D-3

3. Digimon D-4

4. Monster Collections Plus

They are from my personal Taiwan unlicensed gameboy collection and have been tested to make sure they are still working without issue. Feel free to message me with any questions.

You can tell me the unlicensed gameboy games you are looking for directly, and a wanted list will be helpful.