Iron Base

An iron base on an anvil

An iron base is created by placing an iron disc on an anvil (by right-clicking on the anvil when holding a disc), then using a hammer (holding left-click) on the anvil. Eventually, the disc will turn into an iron base, which can be re-obtained either by continuing to hold left-click or by right-clicking the anvil. Iron bases are used to make every type of Poké Ball.