Trial 1

From the entrance, head north-east towards the first den. Press A to interact. You'll face a wild Yungoos (Sun) or Rattata (Moon). Fighting-types like Machop, Makuhita, or Crabrawler are effective.

After the battle, head east to find a Super Potion.

Go north towards a boulder illuminated by light. Search its south side for a hidden Revive.

Proceed to the small den just ahead of the boulder. The den-dweller will ambush you – it's another Yungoos or Rattata.

From the second den, head west, go up the narrow slope to the higher level. Head south on the illuminated floor. Before the ledge back to the entrance, pick up TM31 Brick Break. This TM can teach Pokémon moves that break barrier-like moves such as Light Screen and Reflect.

Return to the illuminated floor and head north. Turn right at the ledge wall and cross the narrow plank bridge.

Continue east on the other side, then go up the slope at the end. Crawl through the small gap in the wall.

Pick up the Super Potion on the floor and hop over the ledge to the left. Inspect the third den nearby. The Pokémon has escaped.

Hop over the ledge to the south, then continue south to return to the illuminated floor. Head north up the slope west from the empty den.

At the top, inspect the fourth den immediately to your right. The Pokémon has escaped again.

Head towards the exit guarded by a trial guide. Continue south-west, hopping over the ledge.

Along the north-western side of the cavern wall, below a small den, find a X Defence. Inspect the den; the Pokémon has returned to the first empty den.

Head south and hop over the ledge to return to the area just before the narrow plank bridge. Cross the bridge back to the eastern side.

Before reaching the other side, you will be ambushed by a Team Skull Grunt. He uses an Lv. 11 Drowzee (Psychic). Dark-types are recommended, or Steel-types like Magnemite.

After the battle, head east and crawl through the gap at the top of the slope to return to the fourth den. This time, you will face a wild Gumshoos (Sun) or Raticate (Moon).

Defeat the den dwellers to gain access to the inner-most part of the cavern. Jump over the ledge to the south and climb the slope to the left to reach the cavern exit where the trial guide was. Approach him and he will step aside.

Enter Totem's Den. Approach the pedestal with the Z-Crystal and inspect it to initiate the Totem Pokémon battle.