Your pets are fine now.

How do I get essences? I REALLY WANNA GET SOME!!!!

-buy from diamond shop
-buy from other players on broker
-get lucky when opening mission satchels
-get lucky when nurturing
-get lucky when battling
-occasionally win them from forum games

I think that revive button might be the one that doesn't work on pets in your party...? You'd have to remove them from your party, revive, and then put them back in.

Alternately, you could use a revival draught. Or they will just heal over time.

Link: https://www.sylestia.com/forums/?thread=13&page=112#1113 Author: Somneli Time Posted: 11/12/2018 at 9:45 AM -buy from diamond shop -buy from other players on broker -get lucky when opening mission satchels -get lucky when nurturing -get lucky when battling -occasionally win them from forum games

Thanks!

all info on essences can be found in the Generator Essence guide.

Post 3 covers the how-to-get-them

Hello, I'm new and a little confused XD. I have a couple of Sylesties that haven't become an Adult yet. They are still in their Adolescent stage. I checked the days I've had them, and some say that they are 20+. What is going on? And, will they grow into an Adult soon? Thank you!

Pets reach adulthood at 27d (once they reach 648 maturity hours)
Adolescence stage lasts for a total of 18 days

Breakdown of aging here

Hi. I'm new and the fall fest is my first major event. Any tips on how to get quality and condition for brewing past "good"?

You want the Condition to be "Good". Every 35-ish minutes the condition becomes one of "Overboiling" (use Calming Powder), "Placid" (Use Reactive Crystals), or "Bland" (Use Herbs and Spices).

By consistently keeping the Condition up you gain percentages towards Bonusses (for which there are three tiers, 0/2, no bonus, 1/2, stat bonus, and 2/2, which is stat bonus+random carried trait for regular and fabled catalysts, and two stat bonusses for Majestic catalysts), which are what Quality relates to.
Quality can be Normal, Good, Great, or Perfect, depending on how consistently the brew is tended.

Copypasting from the Fall Fest Overview:
"There are also Quality and Bonus measurements. Preventing your Brew from having lingering Conditions and continuing to counteract Conditions will improve its Quality. If you keep your Brew at Perfect Quality, it will receive a Bonus every hour. If a Brew has certain amounts of Bonuses by the time it is completed, it will receive up to two special bonuses to the resulting Themed Pet! This may be a tad confusing, so I will try to break it down further.

There are four different tiers of Quality:

Normal: Slowest rate of Hourly Progress and Agent Progress towards completion. No Hourly Bonus. No Agent Bonus.

Good: Double rate of Hourly Progress towards completion. Slowest rate of Agent Progress towards completion. No Hourly Bonus. No Agent Bonus.

Great: Triple rate of Hourly Progress towards completion. Double rate of Agent Progress towards completion. No Hourly Bonus. Single Agent Bonus.

Perfect: Quadruple rate of Hourly Progress towards completion. Double rate of Agent Progress towards completion. Double Hourly Bonus. Single Agent Bonus.

Using an Expedient Brew Agent on a Brew will increase all Hourly and Agent Progress and Bonuses by 300% until the Brew is completed.

If a Condition is ignored for too long*, then every Hour a Brew's Quality will decrease by one tier until settling back at Normal."

(*not sure how long, it is a long enough period that you can have a full night's rest without worry though)