In the test menu you need to alternate the presses, such as pressing back and forth between left and right or up and down a bunch of times as quickly as possible and if you have a bunch of false inputs you have the problem d-pad.
Not really roll, but it can be done without removing your thumb from the d-pad. Just focus on one axis at a time. I was able to confirm I did in fact have a shitty one by doing this. Tetris or Street Fighter could probably give you an idea as well.do you mean roll your finger? I tried different button presses, but I can't recall if I did that. I did try a diagonal press. that read as both right and down, so it didn't know which direction I was pressing. I'll try that tomorrow sometime though.
but anyway, I'll buy a second game soon that utilizes the dpad. I was thinking about tropical freeze since it does have some up and down movements aside from moving right (mostly). I know that game very well after having beaten it countless times on the wii u. 
