How to Get All 27 Mysterious Slates in Pokopia

If you are looking for Mysterious Slates in Pokémon Pokopia, you are almost certainly working toward Mew. This is one of the game's more involved collectible chains because it combines Withered Wasteland exploration, Dowsing Machine farming, daily buff setup, and a final placement puzzle.

Fast Answer

To get all 27 Mysterious Slates:

1. use the Dowsing Machine on glowing ground spots in Withered Wasteland
2. keep collecting until you finish the full slate set
3. improve farming efficiency with sweet food for Mosslax
4. place all 27 slates on the wall painting underground behind the Pokémon Center
5. match the back patterns correctly to unlock Mew

The farming part takes time because you need the full set, not just a total number of slates.

What You Need Before Farming

Before doing serious slate runs, make sure you have:

• access to Withered Wasteland
• the Dowsing Machine
• enough time to clear multiple glowing spots in one session
• ideally, a sweet Mosslax buff already active

Without the Dowsing Machine, this hunt is mostly guesswork. The whole chain becomes much more manageable once you treat it like a repeatable search route instead of random digging.

Core Farming Setup

The Dowsing Machine matters more than anything else. Without it, this stops being a route and turns into blind searching.

Where Mysterious Slates Come From

The site's item data lists Mysterious Slate (?!) as being found by:

• locating glowing ground with the Dowsing Machine
• digging it up

The current Mew data makes the overall objective explicit: collect all 27 Mysterious Slates from Withered Wasteland.

Are There Really 27 Different Slates?

Yes. The site item mapping shows the full set as:

• Mysterious Slate (?!)
• Mysterious Slate (A) through Mysterious Slate (Z)

That is why the hunt takes longer than it first seems. You are not farming raw quantity. You are completing a full alphabet-style collection plus the special slate.

Why the Set Takes So Long

Progress feels slow because duplicates do not finish the collection. What matters is which letters are still missing.

Best Farming Loop

Use this structure if you want efficient slate progress instead of random wandering:

1. start in Withered Wasteland
2. activate the Dowsing Machine and sweep for glowing ground
3. dig every spot you find instead of chasing only one section of the map
4. keep duplicates, but track which letters you still miss
5. return on later sessions and repeat until the set is complete

The biggest time saver is simply staying systematic. Random movement makes it much harder to tell whether you are actually covering the full area.

Sweet Mosslax Buffs Make a Real Difference

One of the most useful related tips on the site is in the Mosslax Guide: sweet food improves ancient-item farming, and the current Mew notes specifically point to sweet flavor as helpful for Mysterious Slate farming.

The strongest existing recommendation on the site is:

• Fluffy Bread for a strong sweet buff

So if you are planning a dedicated slate session, feed Mosslax first and then do your Withered Wasteland search route.

Best Pre-Run Buff

If you are choosing only one prep step before a long farming session, the sweet Mosslax setup is the highest-value one.

How the Mew Puzzle Works

Collecting the slates is only the first half.

The current Mew data says you must:

1. gather all 27 Mysterious Slates
2. go to the wall painting underground behind the Pokémon Center
3. place the slates on the wall
4. match each slate's back pattern to the correct slot

If the wall does not complete correctly, the usual problem is not missing progress in the farm. It is incorrect slate placement.

Final Puzzle Check

Many players think the hunt is unfinished when the real problem is just the wall arrangement.

How to Avoid Stalling Near the End

Most players slow down in the final stretch because they stop tracking the set properly.

To avoid that:

• check which letters you still need
• keep farming in the same Withered Wasteland route instead of changing methods
• do not assume duplicates mean you are doing the wrong thing
• remember that the final puzzle still needs the slates arranged correctly

This is one of those collections that feels much better once you treat it as a checklist rather than a random drop grind.

Common Mistakes

1. Farming without the Dowsing Machine
2. Ignoring Mosslax sweet buffs even though they help slate efficiency
3. Thinking duplicates are useless information instead of tracking what is still missing
4. Forgetting the final wall puzzle and assuming the set alone automatically unlocks Mew

Quick Tips

1. Withered Wasteland is the farming zone for all 27 slates.
2. Always use the Dowsing Machine.
3. Feed sweet food to Mosslax first for better efficiency.
4. Track missing letters, not just total slate count.

Related Guides

• Mosslax Guide: All Offering Buffs & Best Food
• Mew Pokédex Page
• Dream Island Guide: All Dolls, Suicune, Entei & Other Legendaries