During your exploration of the Crown Tundra, you will have the opportunity to catch loads of Legendary Pokemon! Most Legendary Pokemon will be obtained through Dynamax Adventures; however, sixteen Legendary Pokemon, both new and old, can be captured in the Overworld. One of these select few Legendary Pokemon is none other than Terrakion!
Just outside the town exit of Freezington, you will find a small tree with Footprints under it. As you approach these footprints, Sonia will suddenly appear. After getting reacquainted, she will tell of her theory about three Legendary Pokemon having a secondary home on the Crown Tundra. She will ask that you search the Crown Tundra for the footprints of these three Pokemon, asking for you to return to her in Freezington after you have found all of the footprints for each. There are a total of fifty footprints for each of these three Legendary Pokemon in question.
After finding all fifty Footprints of the Cavern Pokemon, return to Sonia in Freezington to update her. With this new bit of information, Sonia will tell you that you should be able to find the Cavern Pokemon in Lakeside Cave. Head there, and you will find Terrakion waiting for you. Terrakion will be at Level 70, knowing the moves Sacred Sword, Swords Dance, Stone Edge, and Close Combat. Since Terrakion isn't the strongest Pokemon in the Crown Tundra, it is recommended not to use your Master Ball on it. Instead, stick to using Ultra Balls. Terrakion can be weakened for easier captures by lowering its HP and paralyzing it.
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