The expansion port on the back of the n64 controller
Testo:
I have been trying to play Pokémon stadium for the n64 but all four of my controllers don’t read that there is a transfer pak and game boy game in the controller, two of the controllers are third party so that’s why they aren’t working with the transfer pak but I was wondering how to repair the oem expansion ports, I have tried three different transfer paks and multiple controllers to no avail, the Pokémon game I have been trying is authentic too, thanks