Here is the full list of all 21 CreaVures achievements.
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.
Meet Rolly.
Meet Glidey.
Defeat Falcon Elm.
Bite the following NPCs: bird, bat, squirrel, reptile, frog, monkey
Collect 750 total motes
Collect 1000 total motes
Collect 1250 total motes
Collect all the motes
Collect 100 essence
Collect 150 essence
Collect all the essence.