How do you get the moshling ecto?

Ecto is part of the Spookies collection.

To attract Moshlings you need to plant three seeds in your garden. You buy seeds from the stand on Main Street or at the Port. Each Moshling has a different combination so you need to work out the correct combination to attract the Moshling that you want. Keep planting seeds until you work it out! The Secret Moshlings may require you to do something extra special to get them, such as find a secret code or complete a mission.