Originally Posted By: Troll
I'm trying to understand how I should make a prototype board so I can have two pins for every button...
Have a look at this:
https://www.dropbox.com/s/ebir2uo5tup971r/6X6%20Button%20Matrix.pdf?dl=0

The triangle is the diode...


Is OK, but in this arrange will result in ~185x45 mm board, difficult to fit inside a "joystick":

http://s24.postimg.org/50mdwwfvp/Matrix2.jpg

Here a more compact 6x6 matrix: 94x40 mm - PCB easy to do with toner method (1 mm trails) and less bridges (blue):