| Hokulani Observatory | Trainers | Items |
| Island: Ula'ula South Exit: Mount Hokulani Hokulani Observatory is located at the top of Mount Hokulani and is where Sophocles' trial takes place and where the Totem Pokémon, Vikavolt, is fought. Form Change: Zygarde Totem Sticker |
 |
| Area Anchors | |||||||||
| Entrance | Hall | Observatory | Trial Site | ||||||
 |  |  |  | ||||||
| Picture | Item | Method |
 | Comet Shard | From scientist at left desk |
Items - Ultra Sun & Ultra Moon
| Picture | Item | Method |
| Comet Shard | From man at reception |
 | Stardust | Answer scientist's question in reception |
 |  |  |
|||||
| Captain Sophocles | Togedemaru | Magnezone | Golem | ||||
| Battle Type Items | Level 51 | Level 51 | Level 51 | ||||
  | |  |
|||||
| Attacks: Fell Stinger Zing Zap Spiky Shield | Attacks: Flash Cannon Discharge Tri Attack | Attacks: Stone Edge Steamroller Thunder Punch |
|||||
| Hold Item: No Item | Hold Item: No Item | Hold Item: Electrium Z |
| Picture | Item | Method |
| Electrium Z | From Sophacles after clearing the trial |
 | Steelium Z | From Molayne after clearing Sophacles' trial |
 | Professor's Mask | From Molayne after clearing Sophacles' trial |
Items - Ultra Sun & Ultra Moon
| Picture | Item | Method |
 | Yellow Petal | From Sophocles during Mina's trial |
Items - Ultra Sun & Ultra Moon
| Picture | Item | Method |
| Electrium Z | From Sophocles after defeating Totem Togedemaru |
| Professor's Mask | From Molyane |
 | PP Max | Complete all four Charjabug puzzles after becoming Champion |