>>38598261>"M-muh patterns"Two can play that game dude. Since Gen VI, it's gone
>Water > Fire > Grass>Dark > Psychic > Fighting>Fairy > Dark > GhostThe most recent starters having an advantage over the preceding ones, hence, by patternfagging, we get
>Poison > Fairy > DarkGiven Grookey's described as a bastard or mischievous depending on what blurb you read (and the last pokémon described as mischievous in-game turned out part-Dark type) it's more likely that's the official pattern as opposed to your theory. Time will tell.