#755 Morelull

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It scatters spores that flicker and glow. Anyone seeing these lights falls into a deep slumber.
– Pokémon Sun Pokédex

#678 Meowstic

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Meowstic, the Constraint Pokémon. When faced with trouble, Meowstic will raise its ears and create enough Psychic power to demolish a ten-ton truck. Its appearance varies, depending on gender.
– Serena’s Pokédex

Mega Altaria

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Altaria dances and wheels through the sky among billowing, cotton-like clouds. By singing melodies in its crystal-clear voice, this Pokémon makes its listeners experience dreamy wonderment.
– Pokemon Omega Ruby Pokédex

#763 Tsareena

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Its long, striking legs aren’t just for show but to be used to kick with skill. In victory, it shows off by kicking the defeated, laughing boisterously.
– Pokemon Sun Pokédex

#773 Silvally

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Although its name was Type: Null at first, the boy who evolved it into this form gave it the name by which it is now known.
– Pokemon Moon Pokédex

#791 Solgaleo

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([edit] updated image, I forgot to anti-alias when exporting, oops)

Radiant Sun Version:

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It is said to live in another world. The intense light it radiates from the surface of its body can make the darkest of nights light up like midday.
– Pokemon Sun Pokédex

Mega Gengar

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Shiny:

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Hiding in people’s shadows at night, it absorbs their heat. The chill it causes makes the victims shake.
– Pokemon Y Pokédex