We almost missed this. Almost. All signs in the picture below point to the fact that we're about to have a bizarre ghost/ground-type Pokémon in Pokémon Sun and Moon:
@kaniclub
The Pokémon is called Sunabaa, which happens to be a play on the Japanese word for 'sandbox.' Sunabaa evolves into Shirodesuna, which literally translates into 'A Castle of Sand.' This news was revealed in Japanese magazine Coro Coro Comi; but the official announcement should be here in short time.