(Buckled Down) Astonishing Marvella

Lore
You had to pass Lalanoël's test if you wanted to help Santa deliver presents. I wanted to one day shoot through the night sky like a comet too, so I was prepared to give it my absolute best this year. Not that I hadn't before, but this time was especially important...

Acquisition
Evolve Astonishing Marvella with Marvella's Diary Page three times.

Name origin
?