I set this list up, so we can keep track of where the hybrids are coming from. This way we will know which pool to use to get the best chance to get a new hybrid.

The most interesting thing is all of the pets that were used to make the three new hybrids were new except for Ebon Spectre. And the pets were either Crowns, Dropped or for Gold. Decius from the Pirate101 Boards did say to try using common pets. Common could mean what you can get easily in-game. And he also said that there were 150 pets in-game we can get in-game excluding the legacy pets. But when I counted the amount of known pets we got even including the game card pets, we have only about 80 pets. There's a massive amount of pets that are missing. We must find them all! He did mention that there were "many" hybrids in-game.

So looking at the chart, a few things becomes clear. If you want to produce a Hybrid, go for pets that are Crowns, Dropped and/or for Gold. No Game Card Pets at all. I wouldn't consider the game card pets to be "common" pets. Tribal Crew Pack and Quest Reward pets should produce a hybrid since they are free pets that gets "dropped" as a reward or "crown" pets we buy. But this is not confirmed. So far, the best *confirmed* combos are from a crown pet x dropped or gold pet. Eventually we'll find different types of combos. But this is what we know right now until things change.
.

Try this combination:

Crown Pet x Dropped or Gold Pet
And don't use any game card pets.

* - Can produce a Hybrid with any pet. For instance, Skarkeet will produce a Skull Island Macaw with any pet. Ostrich will produce a blue Ostrich with any pet.

Red - Tiger Shark
Blue - Frostbiter
Orange - Grimtooth Reaper
.

Beta Pet
Skarakeet*
.
Crown Pets
Clown Fish
Thresher Shark
Hammerhead Shark
Mini Minotaur
Lil Labor Golem
Coral Widow
Silver Buffaloon
Cutie Chameleon
Tropical Sky Snake
Golden Stingtail
Crokagator
Ebon Spectre
.

Gold Pets
Lion Fish
Fandango
Sabertooth Bunny
.
Dropped Pets
Orchid Chameleon
Armadillo Verde
Tawny Sky Turtle
DinoLizard
Quackosaurus
Inky Octopus
Ice Scarab
Coconut Crawlie
Not So Great White Shark
Violet Bubblefish

Fantastic list and a lot of work shown. Thank you.

Decius just confirmed that there's NO hybrids from the Holiday Pets, so cast your fishing lines elsewhere. He also mentioned that the hybrid that he was referring to when he said you can find something new and rare with common pets has STILL not been found yet!

Let's focus on the common pets. It could be dropped pets, gold pets, badge or quest reward pets.

I just stumbled apon another hybrid someone found:

Emusaur:

Orchid Chameleon x Ostrich

It's our first non-shark hybrid! Add this to the list!

Petty Alicia Cog

June 18th Updated Pet List for Hybrid Research
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MY SUGGESTIONS:
Use Crown, Dropped or Gold Pets with each other.
Don't use any Game Card Pets.
Don't use any Holiday Pets. *Confirmed by Pirate101*

* - Can produce a Hybrid with any pet. For instance, Skarakeet will produce a Skull Island Macaw with any pet. Ostrich will produce a blue Ostrich with any pet.
.
Red - Tiger Shark (Toothy Egg)
Blue - Frostbiter (Toothy Egg)
Orange - Grimtooth Reaper (Toothy Egg)
Green - Emusaur (Feathered Egg)
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BETA PET
Skarakeet*
.
CROWN PETS
Clown Fish
Thresher Shark (Toothy Egg
Hammerhead Shark (Toothy Egg)
Mini Minosaur
Lil Labor Golem
Coral Widow
Silver Buffaloon
Cutie Chameleon
Ebon Spectre (Ethereal Egg)
Tropical Sky Snake
Golden Stingtail
Crokagator
.
GOLD PETS
Lion Fish
Fandango
Sabertooth Bunny (Mysterious Egg)
.
DROPPED PETS
Orchid Chameleon (Scaled Egg)
Armadillo Verde
Tawny Sky Turtle
DinoLizard
Quackosaurus
Inky Octopus
Ice Scarab (Pinching Egg)
Coconut Crawlie
Not So Great White Shark (Toothy)
Violet Bubblefish
.
QUEST REWARD PETS
Ostrich* (Feathered Egg)
Imperial Lion
Celestial Dragon
White Tailed Jackalope
.
TRIBAL CREW PACK PETS
Spiny Serpent
Scrimshaw Drake
Deathstalker Scorpion
.
Good Luck!