Primal Groudon is a Ground & Fire type, then has an okay design, although not much different between it and normal Groudon. Now, Primal Groudon has the ability Desolate Land which makes water type moves essentially useless, then still has great stats all around to do wonders in competitive. These two primals are probably the easiest to decide where to rank since I never have been as big a Groudon fan than I have a Kyogre fan, so therefore I almost had to put Primal Groudon as the runner-up.