Instructions
Attract a Horstachio to your garden. To do this, you need a Ponoky living in your garden, and you need 500 square pinometers of grass.
Allow the Horstachio to eat eight apples.
Become a Master Romancer of the Horstachio by getting seven to abide in your garden. The Chewnicorn may now appear.
Plant a gem tree in your garden, and the Chewnicorn will move from appearing to visiting your garden. When your gem tree is fully grown and the Chewnicorn has eaten 15 gems, he will live in your garden.