In Grow a Garden, pets have abilities that can apply mutations, duplicate crops, increase variant chance, and more.
Players start with 3 pet equip slots, but can get up to 8 pet equip slots by trading in aged pets.
You can obtain pets by buying Pet Eggs from the Pet Shop or Event Shops and hatching them.
To hatch an egg, you must place it on an empty spot in your garden and wait for the hatching period.
This article contains a Butterfly pet wiki in Grow a Garden, including its trading value, price, ability, chance, and more in Roblox.
Grow a Garden Butterfly Pet Wiki

The Butterfly in Grow a Garden is a Divine pet that was added in the Friendship Update.
You can obtain it by getting an Anti Bee Egg from the Limited Shop for Robux or by crafting it.
The Anti Bee Egg takes 4 Hours and 10 Minutes to hatch and has a 1% chance of hatching the Disco Bee.
It applies the Rainbow mutation to a nearby fruit with 5+ mutations every ~30 minutes.