Sinnoh's underground guide

[Littlekean]

Hello, since I never found a guide for sinnoh's underground daily quest I've decided to make one myself.

 

Sinnoh's underground is a special daily quest in the sense that you can get no reward, a reward room allowing you to revive a fossile for free or the secret area room that may contain hisui-voltorb, hisui-growlith, scyther holder black augurit and teddiursa holding peat block.

 

REQUIREMENT

1. A ground type with dig (dugtrio in my exemple)
2. A fire type with dig (arcanine in my exemple)
3. A rock type with dig (Lycanrock in my exemple)
4. A water type with dig (Blastoise in my exemple)
5. (if you want to access the secret area) a grass type with dig (breloom in my exemple)
6. A pokemon with flash or a flashlight
7. At least 3000 pk dollars to enter said underground

As a remeinder your dig pkm must have at least 151hapinness to dig, and the grass type with dig must be at max hapiness (255) 

tips: the pokémon you will face in the underground scale relatively to your party's level, if you think your digging pkm will not fight don't level them up.

You can enter sinnoh's underground by talking to the npc in the house next to the pkm center of eterna city by paying 3k 

Spoiler

 

I'll cover the secret area first.

 

To access the secret area you must find the Probopas who acts differently from the others. said probopass will use explosion and/or have sturdy when others don't

Spoiler

 

Each probopass 'guards' a dighole, make your grass pkm dig the hole previously guarded by the odd probopass to get the grass crystal and note down the location as you'll have to go there again at the end

Spoiler

Once you have the grass crystal talk to the ace trainer npc who talks about four crystals type, she'll give you the spot where to place the grass crystal.

 

Spoiler

here it's 7th spot from the left

 

 

 

Spoiler

The final puzzle solution never involves a grass crystal but you have to put it in to get the secret area to spawn

After that it's the same as for normal area except that you MUST dig where you got the grass crystal once the puzzle is solved

 

 

Normal area.

In one of the 4 rooms there's a npc archeologist that will tell you which is the most common crystal type in the solution if you defeat him in battle. (note that he disapears when beaten so pay attention to what he says. his lineup is always the same and the lvl of his pkm scales on your party's average level)

Spoiler

here is his lineup

 

The solution to the puzzle is made of 4 types of crystal, rock, ground, water, fire. whenever you dig a hole with a pkm who's type is one of those your odds of finding crystal of that type raise (I think hapiness also plays a part in that).

 

The leftmost column makes a blue stone if the crystal you put in the middle is part of the solution, the rightmost column makes a blue stone if the crystal you put is in the right position. once the two columns are full you've unlocked the treasure room.

Spoiler

                                                     Note that here the hint was 'water is the most commun crystal type in the solution' yet it had 2 ground, 2 rocks and 2 waters.

 

Once you've completed the puzzle you can now dig to get the tresure room (dig the spot where you got grass crystal to get to the secret area)

 

 

in the secret area you can find at random hisui-voltorb, hisui-growlith, scyther and teddiursa walking around.

the scyther and teddiursa will hold their related evolutionary items.

 

in the regular treasure room you will get items and the possibility to revive a fossil for free

 

This has been my first guide, feel free to correct me if I made any mistakes or wasen't clear enough.

 

[Shiningvn]

thank you for the guide,i guess we need a solution to the "puzzle" and it's prize pool so we can decide which one we should get

 

[Littlekean]

Sadly I have no idea of the prize pool, with it beeing a daily quest it will take quite some time before figuring it out, all I know is regular treasure room tends to give me TM-earthquake/dubious disc/gen1 fossile, while secret area gives me either earthquake or earthpower and 5 to 9 pkm encounter between scyther, teddiursa, huisian voltorb, hisuian growlith. every teddiursa and scyther held the item to evolve into ursaluna and kleavor respectively.

 

regular treasure room also offers the possibility to revive a fossile from your inventory for free.

 

 

The 'puzzle' part with the crystal is quite simple to understand:

 

they're 7 spots that can hold any kind of crystal

 

there's two columns of blue stones

the left one tells you if the crystal you put is part of the solution

the  right one tells you if it's in the right position

 

Exemples below

 

In this situation I know the solution has 2 red crystal (left column got 2 rocks on) and none of the red crystal are in the right position (right column got none)

 

Here I've swaped out a red crystal for a blue and I know that the blue crystal is in the good position because the right column got a new stone

 

In this situation I know the ground crystal (dark brown) is not even present in the solution (since I need one more stone in the left column) and that I should replace it with a red crystal since I got in the 1st step the confirmation that the solution has 2 red crystals.

 

Overall the fastest way to complete the puzzle while minimizing the steps is to take 2 crystals for the most common solution, and put them where it makes the right column grow, then take one of every other crystal, plant them in the spot where they can fit.

 

if one of the crystal type is absent from the solution take a 3rd crystal of the most common color,

else you'll have to try to add one more for the other variety.

if that dosen't work at all you'll have to fetch the most common crystal type again, but hey at least you wont softlock the treasure room, just take a long time to find it.