The Mane Six meet Optimus Prime

This is how The Mane Six meet Optimus Prime goes in My Little Pony: War for Cybertron.

Twilight Sparkle: I have heard of an Orion Pax. Is he a friend of yours.

Optimus Prime: Orion Pax? Orion Pax. Now, that's a name I haven't heard in a long time.

Twilight Sparkle: I think Celestia knows him. She said he was dead.

Optimus Prime: Oh, he's not dead. Not yet.

Twilight Sparkle: You know him?

Optimus Prime: Well, of course I know him. He's me.

Twilight Sparkle:

Optimus Prime: