This is the scene where Tino realized that Carver is actually Ansem and then fights him in Destiny Hearts.
Tino Tonitini: Sunset Shimmer! (runs to her) Sunset Shimmer! Open your eyes.
Carver Descartes/Ansem: It's no use.
(Tino looks up, seeing Carver sitting above the great heart)
Carver Descartes/Ansem: That girl has lost heart. She can not wake up.
(Tino sets Sunset down softly, sensing the darkness in Carver’s voice)
Tino Tonitini: What? You... you're not Carver.
Carver Descartes/Ansem: The Keyhole cannot be completed so long as the last princess of heart still sleeps.
(He drops down off his seat, falling in front of the dark depths)
Tino Tonitini: (looking down at her): The princess...? Sunset’s a princess?
Carver Descartes/Ansem: Yes, and without her power, the Keyhole will remain incomplete. It is time she awakened.
Tino Tonitini: Whoever you are, let Carver go! Give him back his heart!
Carver Descartes/Ansem: But first you must give the princess back her heart!
(He points his Keyblade at Tino, who clutches his chest and falls to the floor, catching himself)
Human Rainbow Dash: Tino!
Tino Tonitini: What's... going on?
Carver Descartes/Ansem: Don't you see yet? The princess' heart is responding. It has been there all along. Sunset Shimmer's heart rest with in you!
Tino Tonitini: Sunset... Sunset Shimmer's inside me?
Carver Descartes/Ansem: I know all there is to know.
Tino Tonitini: Tell me! Who are you!?
Carver Descartes/Ansem: It is I, Ansem, the seeker of Darkness!
(He walks toward Tino, prompting Rainbow to yell out and rush at him, but simply knocks her past the barrier and moves on. He stands over Tino, looking down with euphoria, and points his Keyblade toward him)
Carver Descartes/Ansem: So, I shall release you now, Princess. Complete the Keyhole with your power. Open the door, lead me into everlasting darkness!
(With a mad look in his eye, Ansem lifts the Keyblade, about to strike)
Sunset Shimmer: Tino!
(Tino raises his Keyblade and blocks the strike. Ansem grits his teeth, putting more pressure on the blade)
Tino Tonitini: (standing) Forget it! There’s no way you’re taking Sunset’s heart!
(He knocks back Ansem’s blade, who extends an arm)