MyFragment.kt

class MyFragment: Fragment(){
  companion object{
    private val ARG_CAUGHT = "myFragment_caught"
    
    fun newInstance(caught: Pokemon):MyFragment{
      val args: Bundle = Bundle()
      args.putSerializable(ARG_CAUGHT, caught)
      val fragment = MyFragment()
      fragment.arguments = args
      return fragment
    }
    ...
  }
  ...
}