This is how Kulta defeats the Mane Six and Kulta's defeat goes in My Little Pony: Rise of the Skull Creatures.
[Kulta, the Skull Grinder, arrives at Canterlot and enters the throne room]
Kulta: Well, well. That was easy.
Twilight Sparkle: Magic!
Rainbow Dash: Loyalty!
Pinkie Pie: Laughter!
[They send a powerful rainbow beam towards Kulta. With a single solid swing from his long axe, Skull Grinder defeats them]
[Princess Celestia gasps]
Skull Grinder: At last, the Elements of Harmony are destroyed.
[Skull Grinder prepares to take the killing blow when Tahu, Gali, Pohatu, Lewa, Kopaka, and Onua, wearing the golden masks, show up]
Gali: Let's do it!
Pohatu: Our anscestors did it.
Lewa: We can do it too.
Kopaka: You're right.
Onua: Come on!
[The Toa fight Kulta]
[The Toa start gaining the upper hand]
Skuller Grinder: No. It can't be.
Tahu: Oh, yes it can.
Gali: And we're doing it.
Lewa: Keep it up.
Kopaka: Don't give in.
Onua: We can win!
[They finally perform the final blow, defeating Skull Grinder]