Here is the full list of all 17 I will eat you achievements.
Become a Beast and Roar!
Use the "Quick Run" ability!
Sneeze as hard as possible!
You must get 1 lvl.
You must get 3 lvl.
You must get 5 lvl.
You must get 7 lvl.
You must get 9 lvl.
You must get 11 lvl.
You must get 13 lvl.
You must get 15 lvl.
You must get 17 lvl.
You must get 19 lvl.
Use the Raven spell.
Use the Witch spell.
Use the Teleport spell.
Use the Clons spell.