This is how Optimus Prime and Twilight Sparkle attack Darkmount goes in Rebellion.
Megatron: Well, we may not lose after all.
Starscream: Master, something's coming.
Megatron: The Predacon?
Starscream: Hmm, not beasty enough.
Ratchet: How is that possible?
Ratchet: An Autobot life signal but it's airborne.
[Back at Darkmount]
Starscream: I know those color schemes.
[Megatron moves more forward and to his surprise, the figures are revealed to be Optimus Prime with a new body and Princess Twilight Sparkle.]
Starscream: Wait! He can't fly. Can he?
[Optimus Prime and Twilight Sparkle land and throw a few punches on Megatron, the last one sending him flying to his throne and shattering. Optimus and Twilight then blast Vehicons.]
Optimus Prime: Commander?
Twilight Sparkle: Who's he?
Ultra Magnus: Sir, you're looking robust. [looks at Twilight] Who's that?