This is how Thunder Streak cancels Nightmare Night goes in My Little Pony Transformers Prime: Luna Eclipsed.
[Thunder Streak looks at Luna]
Thunder Streak: I can't make them warm up to me, Luna.
Princess Luna: I know a person who can help.
[They walk back towards Ponyville]
Princess Luna: The only one who would know how to help you make them warm up to you is Ratchet. He is the kindest Autobot I know.
Thunder Streak: Well, let's hope it works.
Thunder Streak: As your friend, we command you!
[He gets angry]
Thunder Streak: [deafening voice] Be still!
Twilight Sparkle: Thunder Streak, remember! Watch the screaming!
Optimus Prime: Please, calm yourself.
Princess Luna: You're scaring them!
Thunder Streak: [booming voice] No, Twilight Sparkle, Optimus Prime, and Princess Luna! We must use the traditional royal Canterlot voice for what we are about to say. Since you choose to fear your friend rather than love him, and dishonor him with this insulting celebration, we decree that Nightmare Night shall be canceled! Forever!
[Thunder Streak runs away]
Applejack: [sigh] Shoot. We had everything going our way. Thunder Streak was happy, everypony in town was happy, now look at 'em.
Bulkhead: They all look so sad.
[They look at the ponies around them]
Noi: [crying] But I wanted to be a zombie next year.
[Twilight has an idea]
Twilight Sparkle: It's not over yet.
Optimus Prime: I agree.
Princess Luna: I'm with you.
Applejack: What are you gonna do?
Twilight Sparkle: We're going to do what we do best. Lecture him!
Optimus Prime: Yeah.
Princess Luna: Proof to him there is another he can gain their trust.
[Twilight, Optimus, and Princess Luna follow Thunder Streak]
[Thunder Streak walks over a bridge]
Twilight Sparkle: Thunder Streak?
Optimus Prime: Can we talk for one moment?
Princess Luna: It'll be quick! I promise.
Thunder Streak: Leave me be, Twilight Sparkle, Optimus Prime, and Princess Luna.
Twilight Sparkle: Thunder Streak, I'm sorry it hasn't worked out how we wanted. But you have to believe me when I tell you that Nightmare Night is one of the most popular celebrations we have.
Optimus Prime: Indeed.
Princess Luna: It's a time for scares and candy and stuff like that.
Thunder Streak: Yes. I can tell. By all the adoring shrieks of the children as they run away. [continues on his way]
Twilight Sparkle: Thunder Streak...
Optimus Prime: Please.
Princess Luna: I know that they still fear you but you can gain their trust.