Sun & Moon Hokulani Observatory
The electric trial runs out of the Hokulani Observatory, high on the summit of Mount Hokulani where Molayne keeps the telescopes turning. Of the four trial sites, it's the one that looks like a workshop.
Hokulani Observatory is in Alola, with Route 10 to the south. In the story it comes after Mount Hokulani and before Route 11.
Pokemon Encounters
ITEMS
All field items and hidden pickups at Hokulani Observatory.
Professors Mask
Lost by Professor Kukui.
Professors Mask
Lost by Professor Kukui.
Comet Shard
Sell to Ore Collector for 60000 Pokédollars.
Electrium Z Held
Held: Allows a Pokémon to use the Z-move equivalents of its Electric moves.
Steelium Z Held
Held: Allows a Pokémon to use the Z-move equivalents of its Steel moves.
Zygarde Cell
Collectible gathered across Alola and stored in the Zygarde Cube; combined at the Reassembly Unit to build Zygarde (10 / 50 / 100 for the 10%, 50%, and Complete Formes).
TRAINERS
The electric trial keeps a single battle in reserve, a level 29 Vikavolt that calls a level 28 Charjabug to its side the moment the fight starts turning against it.
