Bonsai, sounds familiar… Oh look, he’s in my arena team! 
Guess I saw the red arrows and ignored the text/parenthesis, especially in the excitement of getting my first rare pet.
So I’m gonna say thanks!, as your post obviously helped and I replaced him, but I still don’t really get how pets work - does their order in the team matters or how does the support skill work. Any chance there’s a post explaining pets in more detail? Like the awesome post about Arena & build guide?