This is how Rarity and Bumblebee vs. Optimus and Twilight goes in My Little Pony Transformers: The Last Knight.

[We see Rarity and Bumblebee getting ready to battle Optimus and Twilight]

Rarity: Let's do this.

[they charge at Optimus and Twilight and engage in combat against them]

[Bumblebee and Optimus face off]

Optimus Prime: I am Nemesis Prime! You are nothing!

[Rarity and Twilight face off]

Twilight Sparkle: I am Nightmare Sparkle! You are nothing!

[Rarity gets out her magic hammer]

[Bumblebee then stops Optimus' blade]

Bumblebee: I-I am Bumblebee...your oldest friend! Optimus...I would lay down my life for you.

[Optimus' optics turn blue again]

Optimus Prime: Bumblebee. I have not heard your voice since Cybertron fell.

[We see Rarity trying to talk to Twilight]

Rarity: Twilight, I will always be your friend.

[Twilight tries to bring her horn down on Rarity]

[Twilight sees Rarity has stopped it]

Rarity: I would lay down my life for you, even to avenge you.

[Twilight's eyes transition from red to purple again]

Twilight Sparkle: Rarity. I don't know what came over me.

[Twilight backs up]

[Bumblebee pulls his parts back to him, putting himself back together]

[Megatron suddenly attacks with Nitro Zeus]

[He knocks down Optimus and Twilight]

Megatron: Quintessa, the most ruthless of our planet, knew you couldn't do it. She knows I'm strong and you're weak.

[He steals the staff from them]

Megatron: You turned your back on Cybertron. Now you will watch Equestria die.

[They fly off as a Cybertronian knight comes out and punches Optimus and Twilight]

Cybertronian Knight:

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