Here is the full list of all 80 Coromon achievements.
The base game contains 76 achievements, and there is 1 DLC pack containing 4 achievements.
Read your mother’s diary.
Trigger Twilight in a battle.
Trigger Rain in a battle.
Trigger a Sandstorm in a battle.
Trigger a Heatwave in a battle.
Trigger Snow in a battle.
Potentiflate a Coromon.
Traitformate a Coromon.
Resetinate a Coromon.
Evolve a Coromon.
Have 6 Coromon of different types in your Squad.
Have 6 Coromon of the same species in your Squad.
Redeem a Shop coupon.
Give a Fruit to a Coromon.
Dig up a Hold item.
Have all Squad members in the same Spinner type.
Use a Skill Flash on one of your Coromon.
Pick your starter.
Defeat the mysterious intruder.
Defeat Voltgar.
Defeat Illuginn.
Defeat Sart.
Win the Mirror Challenge.
Defeat Hozai.
Join the Alavi festivities.
Defeat Vørst.
Defeat Chalchiu.
Complete 5 side quests.
Reach Researcher Level 50.
Reach Researcher Level 100.
Complete the story without letting one of your Coromon faint.
Catch every Coromon species.
Complete the game on Easy or higher.
Complete the game on Normal or higher.
Complete the game on Hard or higher.
Complete the game on Insane.
Collect the hidden bunny ears.
Collect the hidden santa outfit.
Collect the well-hidden sneak outfit.
Cross the bridge in the Scorching Sands safely.
Plant fruits, everywhere!
Get a score of 1000 in Swurmy Rush.
Get a score of 500 in Flappy Swurmy.
Watch the credits.
Open all doors in a town.
Give your starter to Jerome.
Unlock the electro magnetic lock in the R&D lab.
Brew a Potent Scent.
Evolve a Squidly before level 37.
Evolve a Purrgy before level 30.
Evolve a Swurmy before level 14.
Evolve a Slitherpin before level 25.
Evolve a Lunarwulf before level 39.
Get some free cakes.
Pet a Swurmy into madness.
Catch a Toruga where the last track ends.
Catch a Nibblegar in the painter's cave.
Catch a Cubzero on the highest mountain.
And I still get service.
Prove you’re weatherproof.
What’s up boss?
This sauna is too much.
Time for a new look! Who needs a barber?
Spend your last penny in a shop.
Spend less than 50 gold on a purchase in a shop.
Create a crop circle.
Try out the randomizer mode.
Earn 5000 Gold from Gems.
Reach level 99 with a Coromon.
Complete the Throwing Arm training.
Complete the Haggle training.
Find 150 Hidden items.
Defeat 60 trainers.
Have three different Coromon of the same family in your Squad.
Have six Potent Squad members.
Have a Purrgy and a Houndos in your Squad
Find the cave within the cave within the cave.
Devolve a Coromon.
Keep a Coromon from evolving.
Keep a Coromon from evolving twice.