Played this loads today. I’ve managed to rank up to level 83 or 84, around 8 levels or so. Did this mainly through master romancing Kittyflosses, getting Buzzenges resident, converting some sours (Cocodile, Macaraccoon, Lemmoning), sending loads of things off to parties, and catching a few Pinarctic pinata, like the Pengum.
Oh, and other species were master romanced too – Pretztails, Pienas, and some others. Now I just need to figure out what other stuff I need to feed to my Choclodocus to make it grow…