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Its description on the official site talks about it being valiant, and having the pride of a warrior.
>"Grubbin loves electricity, which is why it can be found near power plants and substations."
>It ends up evolving into an Electric type
>"Rockruff is a sociable Pokémon, but as it grows, its disposition gets wilder. If it begins to howl when the sun goes down, that is proof that it’s close to evolving."
>It ends up evolving into a wolf/werewolf
It's hinting towards Jangmo-o evolving into a Dragon/Fighting type.
