This Python script generates a catalog both in txt and html of all your Game Boy and Game Boy Color games inside a folder.
It includes information like Name, ROM size, real size, RAM size, MBC type, Color an SGB info, etc.
Copy the script and run this command in your romset folder: python gbcatalog.py
It can open the following files: .gb .gbc .cgb .sgb .dmg or .zip
Output examples here: