Sinnoh Underground

Sinnoh Underground is a daily quest that can be started in Eterna City House 2. There is a 2,000 fee for entering the underground.
It is one of the lesser known daily activities, but it can give some good rewards if you can find the Treasure Room.

The Underground

In Eterna City House 2, speak with Explorer Stanley and he will give you the option of entering Sinnoh Underground for 2,000. Once underground, speaking with Explorer Stanley again will give you the option to resurface, but he warns that you will not be allowed to enter again for another 24 hours.

While doing Sinnoh Underground, your goal is to find the Treasure Room, which as its name implies, holds many Valuable Items that you can earn. There are several holes in the wall scattered throughout each of the four areas, one of which will lead to the Treasure Room. The "Explorer" NPCs can give hints as to where the correct hole can be found.

Hints

In each of the four corners, you can find two "Explorer" NPCs that will give you hints to which hole leads to the Treasure Room. However, before they give you the hint, they will ask for either a Pokémon or an item. Below are the possible Pokémon and items. The Pokémon can all be found in the initial map you arrive at—Underground Path Sinnoh Entrance. As a side note, any two or more NPCs that ask for the same Pokémon or item will give the same hint. So it is best to avoid these to save time and items.

Pokédex Number		Pokémon	Type 1	Type 2	Rarity Tier	Held Item
#027		Sandshrew	Ground		Common
#042		Golbat	Poison	Flying	Common
#050		Diglett	Ground		Common
#074		Geodude	Rock	Ground	Common
#104		Cubone	Ground		Uncommon
#111		Rhyhorn	Ground	Rock	Uncommon
#299		Nosepass	Rock		Common
#436		Bronzor	Steel	Psychic	Uncommon
#524		Roggenrola	Rock		Rare

Item		Quantity
	Stardust	1
	Tiny Mushroom	1

All of the possible hints that can be given are shown below:

• File:UndergroundHint1.png
• File:UndergroundHint2.png
• File:UndergroundHint3.png
• File:UndergroundHint4.png
• File:UndergroundHint5.png
• File:UndergroundHint6.png
• File:UndergroundHint7.png
• File:UndergroundHint8.png
• File:UndergroundHint9.png

Rewards

One of the unique aspects about this activity is that it rewards the player with a chance to freely sync a Fossil. Furthermore, you will be rewarded with PvE Coins and some of the Valuable Items shown below.

Item		Quantity
	Nugget
	Pearl
	Stardust
	Tiny Mushroom