WSL has its own file system that's not accessible from Windows, but the Windows file system, *is* accessible from WSL. So you're going to want to install pokecrystal within the Windows file system.
The Windows `C:\` drive is called `/mnt/c/` in WSL. You will have to change the current working directory to within `/mnt/c/` every time you open WSL.
For example, if you want your pokecrystal in `C:\Users\<user>\Desktop`:
```
cd /mnt/c/Users/<user>/Desktop
```
(Replace `<user>` with your username.)
You will have to run this command each time you open WSL.
Follow [the instructions for Linux](#linux) to complete the installation.
If this doesn't work, try following the regular Windows installation instructions below.
Download [**Cygwin**](http://cygwin.com/install.html): **setup-x86_64.exe** for 64-bit Windows, **setup-x86.exe** for 32-bit.
Run setup and leave the default settings. At "Select Packages", choose to install the following, all of which are in the "Devel" category:
-`make`
-`git`
-`gcc-core`
Click once on the text that says "Skip" next to each package to select the most recent version to install.
Then download [**rgbds**](https://github.com/rednex/rgbds/releases/): the latest **win64.zip** or **win32.zip** release. Extract it and put all the `exe` and `dll` files individually in **C:\cygwin64\usr\local\bin**.
**Note: If you have an older rgbds, you will need to update to 0.3.7 or newer.** Ignore this if you have never installed rgbds before.