Pokémon Sleep: Greengrass Isle (Expert) Guide | Teams, Hunting & Rewards

Greengrass Isle (Expert) is a challenging research area where Snorlax’s favorite Berries change randomly every week, encouraging you to adjust your team accordingly.

Personally, I visit this area not only to reach higher Snorlax ratings but also to hunt various Pokémon and earn additional research rewards. In this guide, I’ll explain how Greengrass Isle (Expert) works, how I approach team building, and why I enjoy spending time here.

Greengrass Isle (Expert): Basic Mechanics and Differences From Regular Greengrass Isle

Greengrass Isle (Expert) is unlocked after reaching Master 18 on regular Greengrass Isle. You need an Expert Ticket to enter, and Expert areas accumulate their own Expert Bonus separately from regular areas.

Main Favorite Berries vs. Sub-Favorite Berries

Each week, Greengrass Isle (Expert) selects three favorite Berry types: one main favorite and two sub-favorites.

Pokémon that gather the main favorite Berry receive 10% shorter helping intervals and +1 to their main skill level. Pokémon that gather sub-favorite Berries don’t receive these additional bonuses, but all three favorite Berry types provide twice the usual Berry Strength.

In addition, one of the following weekly Expert effects is randomly selected and applies to Pokémon that gather the favorite Berries.

For example, an Ingredient Gathering Boost makes Ingredients specialists that match the favorite Berries more attractive. A Main Skill Chance Boost can make matching Skills specialists particularly useful.

I recommend checking both the favorite Berries and the weekly Expert effect before deciding on your team.

How to Build a Team for Greengrass Isle (Expert)

My general approach is to prioritize Pokémon that gather Snorlax’s favorite Berries while continuing to use strong Pokémon that fulfill important roles.

You don’t need every Pokémon on your team to match a favorite Berry type.

Strong Pokémon Can Still Perform Well Despite the 15% Speed Penalty

In Greengrass Isle (Expert), Pokémon that don’t gather any of the three favorite Berry types have their helping intervals increased by 15%.

This penalty certainly matters, but in my experience, it doesn’t force me to completely change my usual team.

For example, I sometimes use Dedenne or Spheal (Holiday) even when their Berries aren’t among Snorlax’s favorites.

Dedenne’s Tasty Chance S is particularly powerful, and I find it useful even with the speed penalty. I also use Spheal (Holiday) depending on the rest of my team’s composition.

The same applies to Berries specialists. A well-trained Pokémon with exceptional Berry production can still generate substantial Strength even when its Berry isn’t favored.

For that reason, I wouldn’t choose a poorly trained Pokémon solely because its Berry matches one of the weekly favorites.

I generally start with Pokémon that benefit from the week’s bonuses, then fill essential roles such as healing, cooking support, and ingredient gathering with whichever Pokémon perform best.

Changing Your Team Each Week Is Part of the Fun

One thing I particularly enjoy about Greengrass Isle (Expert) is that the changing favorite Berries give me opportunities to use different Pokémon.

In regular research areas, team compositions often become relatively fixed as you train stronger Pokémon. I’ve personally experienced this, and using almost the same team every week eventually became a little repetitive.

Greengrass Isle (Expert) gives me a reason to revisit Pokémon I don’t normally use.

I don’t always focus exclusively on maximizing Strength. Sometimes, I simply enjoy building a different team around the week’s favorite Berries.

That variety is one of the reasons I find Greengrass Isle (Expert) enjoyable.

Aim for Master 20 During Events With Helpful Bonuses

If your goal is to reach Master 20 at Greengrass Isle (Expert), I recommend attempting it during an event that makes gaining Strength easier.

Expert areas require significantly more Strength to reach higher ratings than regular areas. Combined with the random favorite Berries and weekly Expert effects, reaching Master 20 during an ordinary week can be extremely difficult.

Events That Increase Cooking Strength Are Especially Useful

Personally, I consider events that increase cooking Strength particularly promising opportunities.

For example, if an event increases cooking Strength by 1.5×, it becomes easier to reach higher ratings than during a normal week.

To take advantage of this, you’ll want reliable Ingredients specialists that can consistently supply the ingredients needed for powerful recipes. Pokémon such as Dedenne, with Tasty Chance S, can also be valuable when aiming for Extra Tasty dishes.

Of course, event bonuses alone won’t guarantee Master 20. You’ll still need a strong team, sufficient ingredients, and a favorable combination of event bonuses and weekly Expert effects.

Raising Berries Specialists of Different Types Gives You More Options

If you want to reach higher Snorlax ratings consistently, raising strong Berries specialists across multiple types can be useful.

Since favorite Berries change every week, relying too heavily on one or two types may prevent you from taking full advantage of the weekly bonuses.

Pokémon with Berry Finding S, Helping Bonus, and Helping Speed bonuses are especially valuable when their Berry types match Snorlax’s favorites.

However, I don’t think you need to train a strong Pokémon of every type just to reach Master 20.

Training requires substantial amounts of Candy and Dream Shards, and it may be more practical to prioritize Pokémon that are also useful in other research areas.

My recommendation is to continue strengthening your regular team and attempt Master 20 when an event and the weekly favorite Berries give you a favorable opportunity.

Benefits of Visiting Greengrass Isle (Expert)

Greengrass Isle (Expert) is worth visiting even when you’re not aiming for a particularly high Snorlax rating.

Personally, I often choose this area when I don’t have a specific Pokémon I want to hunt.

More Research EXP, Dream Shards, and Pokémon Candy

Expert mode offers increased Research EXP, Dream Shards, and Pokémon Candy rewards for researching Pokémon sleep styles.

I particularly appreciate the additional Dream Shards, since training multiple Pokémon can consume a considerable amount of them.

However, Expert areas also require more Drowsy Power to encounter certain sleep styles. Your actual rewards will depend on your Snorlax rating and the Pokémon you encounter, so you won’t necessarily earn more than in a regular area every time.

A Good Place to Hunt Several Different Pokémon

Greengrass Isle (Expert) has a very large variety of Pokémon, making it difficult to focus on hunting one specific species.

However, this becomes an advantage when you have several Pokémon you’re interested in.

For example, I’ve used Biscuits on Pokémon such as Natu and Happiny when I happened to encounter them at Greengrass Isle (Expert), since I hadn’t finished hunting for strong individuals of those species.

You won’t necessarily encounter the exact Pokémon you want every week. Nevertheless, keeping several potential targets in mind and catching them whenever they appear is a comfortable way to make gradual progress.

I wouldn’t recommend this area if your goal is to catch many individuals of one particular species, but I think it’s excellent for hunting a variety of Pokémon over time.

You Can Still Find Good Hunting Targets When You Get the Snoozing Sleep Type

Another advantage I personally appreciate is that I can usually find Pokémon worth catching even when my sleep research produces the Snoozing sleep type.

In Pokémon Sleep, your sleep type doesn’t always turn out the way you want. Depending on the research area, getting a particular sleep type may leave you with relatively few Pokémon you’re interested in.

For Snoozing specifically, I personally rate areas such as Taupe Hollow highly because of their Fire-type Pokémon. Lapis Lakeside also offers valuable targets such as Ralts and Dedenne, while Old Gold Power Plant has several excellent Electric-type Pokémon.

In some other research areas, however, I find myself less excited about the available Snoozing encounters.

Greengrass Isle (Expert) has such a broad encounter pool that I can usually find something worth hunting, regardless of which sleep type I get.

This doesn’t mean Greengrass Isle (Expert) increases your chance of getting the Snoozing sleep type. Rather, I appreciate having more potential targets when Snoozing does occur.

Greengrass Isle (Expert) vs. Regular Research Areas: Which Should You Choose?

I recommend choosing between Greengrass Isle (Expert) and regular research areas based on whether you have a specific Pokémon you want to hunt.

For example, if you’re actively hunting Ralts, Dratini, or Stufful, Lapis Lakeside is an attractive destination.

Likewise, Amber Canyon is worth considering if you’re looking for Bagon or Trapinch.

When you want to catch several individuals of a specific Pokémon, a regular research area with a more focused encounter pool may provide better opportunities.

For recommendations on which Pokémon to hunt in each area, see the following guides:

• Best Pokémon to Hunt at Lapis Lakeside
• Best Pokémon to Hunt at Amber Canyon
• Best Pokémon to Hunt at Snowdrop Tundra

On the other hand, if you don’t have a particular target for the week, Greengrass Isle (Expert) is an appealing option.

You can collect research rewards while using Biscuits only when you encounter Pokémon you’re interested in.

I personally tend to visit regular research areas when I want to focus on a particular species, then return to Greengrass Isle (Expert) when I prefer a more relaxed week of research.

Conclusion | Greengrass Isle (Expert) Is a Great Choice When You’re Unsure Where to Go

Greengrass Isle (Expert) is a challenging area with changing favorite Berries, but strong, well-trained Pokémon can still perform effectively despite the 15% helping-speed penalty.

If you’re aiming for Master 20, taking advantage of event bonuses is a sensible strategy. Otherwise, the area offers valuable research rewards and opportunities to hunt a wide variety of Pokémon.

I recommend using regular research areas when you want to focus on specific Pokémon, and Greengrass Isle (Expert) when you’d rather enjoy a more relaxed week of research.

For me, that balance makes Greengrass Isle (Expert) one of the most enjoyable places to visit when I haven’t decided on a particular goal.