Takara Tomy has posted information about figures releasing of the upcoming forms of Necrozma, the Dusk Mane Necrozma and the Dawn Wings Necrozma, from Pokémon Ultra Sun and Ultra Moon. With this, the Japanese manufacturer inadvertently revealed that Necrozma is to keep the types of Solgaleo and Lunala, becoming Psychic/Steel and Psychic/Ghost type in the respective forms.
It also revealed the height and weight of these forms. Dusk Mane Necrozma is 3.8m tall but weighs 460kg, twice that of Solgaleo while Dawn Wings Necrozma is 4.0m and weighs 350kg, an increase of 230 on Lunala. As this is a merchandise leak, it’s currently not completely accurate, but it is a likely indicator of future types.
Source: Serebii
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