"Luna Eclipsed" is a Halloween episode of the animated TV series My Little Pony Friendship is Magic
Twilight and Luna S2E04

Screenshot from the episode.

See the article on Luna Eclipsed on Fandom's Mlp wiki.

Oh no! This Halloween article has serious gaps or missing content for the topic. Did the monsters take it? How scary! Can you help fix it? You go that way, and I'll go this way...