There are some non-butterfly critters in the game that help the player in some way with raising their butterflies.

As your butterflies like to live in symbiosis with their environment, you'll find other creatures as well as butterflies in your forest.

Flutterpedia§Chapter2 Creatures

You can meet the following Creatures in your Forest:

The rarest creatures you may encounter during Wisp Events – the Wisp Mother and her Wisps.

Community content is available under CC-BY-SA unless otherwise noted.