Moon Alisa is one of the six skins released in the Alien Artshop offer. It could be purchased as part of an item deal in early January 2018.
Moon Alisa could be purchased for $9.99 in a limited time deal that included 16000 coins. It was not available for individual purchase and may not be available for purchase in the future.
Details of this skin may vary depending on location, platform or time.
Note: The part of the Alien Artshop offer with the Moon Alisa skin was released again for a limited time in mid September 2019. The price and included coins for Moon Alisa remained the same.