>>27076909>Ground is SE against 5 types, a Pokémon with a power of 110 that can hit 5 types for SE damage is useful as hellYou're neglecting the heavy competition it faces on all of these, save for Electric stages. And even there, you already have Garchomp and Landorus-T (which does more damage in the long run), plus often something like Golurk or Gliscor to deal with disruptions. Groudon only competes for the fourth slot.
And for those Rock and Fire stages that Quake works on, Kingdra has a more reliable ability in Whirlpool.
>he brings Darkrai to Ghost stagesYou're not making it any better.