Stylus for Surface Duo?

I just bought a second-hand surface duo running android for the sole purpose of emulating nintendo ds. I want a stylus to emulate that part of the experience, but all styluses are a lot more expensive than i anticipated. But they seem to include stuff i really dont need such as bluetooth connectivity and such like.

Can i just get any pointy plastic thing to use as a stylus or do i need one of these that connect to the phone?