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In addition to their 4 battle moves Pokemon get 4 "field moves" which cannot be used in battles and dont function as attacks like that but they have the functionality of HMs like Cut and Rock Climb as well as stuff like Dig and Teleport, and since they aren't balanced for battle you can create dozens of them and have the world be full of various interactables and planning out your teams field moves will be rewarding by being able to access lots of out-of-the-way treasures or rare Pokemon/strong trainers or any kind of non-story essential reward really.