a newcomer to the scene, primarina mainly checks in to this list as a nuke. its main selling point is a 126 special attack stat, which lets it destroy a lot of pokemon when holding a choice specs with its dual stab attacks + ice beam. it also can run bulky variants, especially with its 116 special defense stat and its beneficial additional fairy typing, but i would forego that path because it can be outclassed by other bulky waters (some who will appear later).
Number 19: Primarina