portable raspberry pi

Hi, I'm trying to build a portable console by using raspberry pi 4, and I want to connect analog sticks to it. Is there a way how to connect an analog joystick(preferable from the Switch or Vita) to GPIO pins? or maybe something like a connector to USB? Thanks in advance.

Hello everyone, I've been working on making a portable Raspberry Pi for a while now, and it's so close to being done. Here's a link to my worklog that has more details: hackaday.io. Everything is working except my power setup. Basically I am trying to power this 5" display and the Raspberry Pi...