Looking up a Kirby BGM to see what its name actually is…
Turns out the reason it's called both "Fatal Blooms in Moonlight" and "Moonstruck Blossom" is because it was localised differently in two different Miiverse developer posts?
https://web.archive.org/web/20171018135910/https://miiverse.nintendo.net/posts/AYMHAAACAADRUqGDpvDNhg
https://web.archive.org/web/20170829071939/https://miiverse.nintendo.net/posts/AYMHAAACAABnUYoNFWtB9g