The last of the Regi ruins is located at the end of the left-hand side path when arriving from Frigid Sea. To enter it, you need to catch all of the other Regi first. After stepping through the door, you must make a choice between Regieleki or Regidrago.
|TR09 Thunder||To the left of the entrance to Split-Decision Ruins, up the stairs.|
|TR24 Outrage||To the right of the entrance to Split-Decision Ruins, up the stairs.|
These appear as sparkling spots all over the place, usually near trees, rocks and other objects. Please note that the hidden item you obtain may be different to what’s listed, as some items are randomised. Also, hidden items will respawn each day.
|Stardust||Above the tall grass on the right, when coming from Frigid Sea. Near one of the three tall, pointy rocks.|
|Rare Bone||Around the back of the tall, pointy rock on the left, hidden among the tall plants.|
|Thunder Stone||Search the bushes to the left of the stairs of Split-Decision Ruins.|
|Ultra Ball||Also search the leafy plants to the right of the stairs.|
|Revival Herb||Head towards the pointy rock to the right of the Frigid Sea entrance. Search the plants around the side, before reaching the Pokémon Den near the back.|
|Energy Root||Next to tree past the second Pokémon Den, near the final entrance to Roaring-Sea Caves.|