Mega Tyranitar

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Due to the colossal power poured into it, this Pokémon’s back split right open. Its destructive instincts are the only thing keeping it moving.
– Pokémon Ultra Sun Pokédex

Mega Diancie

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It can instantly create many diamonds by compressing the carbon in the air between its hands.
– Pokémon Y Pokédex

#76 Golem (Alolan)

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It fires rocks charged with electricity. Even if the rock isn’t fired that accurately, just grazing an opponent will cause numbness and fainting.
– Pokémon Sun Pokédex

#75 Graveler (Alolan)

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Its preferred food is dravite. After it has eaten this mineral, crystals form inside the Pokémon, rising to the surface of part of its body.
– Pokémon Sun Pokédex

#74 Geodude (Alolan)

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Its body is a magnetic stone. Iron sand attaches firmly to the portions of its body that are particularly magnetic.
– Pokémon Sun Pokédex

#805 Stakataka

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When stone walls started moving and attacking, the brute’s true identity was this mysterious life-form, which brings to mind an Ultra Beast.
– Pokémon Ultra Moon Pokédex

#793 Nihilego

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One of several mysterious Ultra Beasts. People on the street report observing those infested by it suddenly becoming violent.
– Pokémon Moon Pokédex