Creating a pets guide was one of my long-term goals in the game, considering how we already have a equipment & skills guide, as well as the spirit bottle list. Originally, this was aimed at helping players struggling to find pets. But I do have second thoughts, such as if the guide may be too useful that it could spoil players early on, or if the explanation within my guide would be too tl;dr for anyone. Anyway, here is the link to it, and keep in mind that it is still in-progress, so there may be errors that I haven't noticed.
https://docs.google.com/spreadsheets/d/1IuFfIKLtsV1GH8OKo1Wp739NyybrJkxXAkEPa8DMhU4/edit?usp=sharing