This is how The Witch Doctor hypnotizes Twilight goes in The Witch Doctor's Revenge.
[Starlight and Twilight walk when they see the Witch Doctor]
Twilight Sparkle: Hold it, Starlight. That's him. That's the Witch Doctor.
[The Witch Doctor walks by and doesn't notice them]
Twilight Sparkle: Let's surround him. You go that way. And l'll go this way.
[Starlight does as she's told. As Twilight readies her magic, the Witch Doctor aims his staff at Twilight]
Witch Doctor: Watch my Skull Staff and you will do as you are told. You are Twilight. And that's a fact.
Witch Doctor: So you will be my slave. Find what I need. And after then will you be freed.
[The Skull Staff glows and Twilight's eyes turn red]
Twilight Sparkle: Yes. Master.
Witch Doctor: Now find me Quaza.
Twilight Sparkle: Yes, master.
[She walks off to do so]
[Starlight is looking around when she hears something]
Starlight Glimmer: Twilight?
[Starlight sees Twilight
[Twilight is finding Quaza when a Scorpio attacks]
Witch Doctor: Very good, but now the Witch Doctor strikes.
Witch Doctor: When I blow this whistle, you won't be a slave. You'll be a tasty snack for a hungry Scorpio.
[As the Witch Doctor prepares to blow the whistle, Starlight takes the whistle and the Witch Doctor blows into his fingers]
Witch Doctor: What?
[He turns and sees Starlight]
Starlight Glimmer: Leave my teacher alone!
[Starlight blows the whistle and Twilight snaps out of her trance]