Harmony Rainbows Power is Magic Part 1 is the first episode of My Little Pony Rainbow Power is Magic, which premiered to coincide with the debut of its airing television channel, The Hub. The episode is referred to as Mare in the Moon, another title for Nightmare Moon, on Hasbro's viewing guide. It is the first half of a two-part episode.
Under Princess Celestia's instructions, Twilight Sparkle goes to Ponyville to supervise the preparations for the Summer Sun Celebration and make some friends. However, Twilight is preoccupied with the impending return of Nightmare Moon from her thousand-year banishment.
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