Interestingly enough, different games seem to have different internals. Here's a more traditional PCB design found inside a 1-2-Switch cart: http://imgur.com/a

Interestingly enough, different games seem to have different internals. Here's a more traditional PCB design found inside a 1-2-Switch cart: http://imgur.com/a/FndZC http://imgur.com/a/FndZC