Intellivision Store Game Changer

Mattel Intellivision store display game changer
This is an official MATTEL INTELLIVISION store display cartridge changer: Model #3806. It allows you to plug in 8 regular games (plus a couple extra slots) and select between them using the Intellivision hand controllers.

Also:
SNES Demo system
Metal Slug 1,2,X,3,4,5 AES Japanese