Here is the full list of all 21 CreaVures achievements.
Collect 150 essence
Collect 1000 total motes
Meet Glidey.
Collect 750 total motes
Meet Rolly.
Collect 100 essence
Zap yourself in water.
Meet Zappy.
Defeat Goliath Trout.
Collect 500 total motes
Collect 250 total motes
Collect 50 essence
Collect 100 total motes
Collect 25 essence
Hit an enemy outside the field of view with Pokey.
Meet Pokey.
Defeat Falcon Elm.
Bite the following NPCs: bird, bat, squirrel, reptile, frog, monkey
Collect 1250 total motes
Collect all the motes
Collect all the essence.