This is how Nightmare Moon Vs. Luna goes in The Battle of Nightmares and Dreams.
Nightmare Moon: Luna, Luna, Luna. You traitorous fool. How devious of you it was to give up your power and strength.
Princess Luna: Your nightmares shall no longer plague minds, Nightmare Moon. For our dreams are more powerful than you think.
Ryan F-Freeman: You tell her, Luna.
Nightmare Moon: Well, Ryan and Princess Luna, dreams are disturbing compared to you.
Ryan F-Freeman: If that's so.[in royal Canterlot voice] I'LL SHOW THAO THAT DREAMS ARE BETTER THEN YOUR SO-CALLED NIGHTMARES!!!
[Luna and Mightmare Moon starts to