This is how Trypticon arrives goes in My Little Pony: Trypticon Attacks.
[We see Knock Out sitting on a billboard]
Knock Out: [sighs]
[Knock Out sees a gigantic Cybertronian meteor fly past him and flies to the Everfree Forest.]
Knock Out: What is that?
[The meteor flies over Ponyville and crash lands in the Everfree Forest.]
Twilight Sparkle: What was that?
Rainbow Dash: Let's check it out!
Pinkie Pie: Yeah!
Rarity: We must!
Applejack: Let's go!
Fluttershy: I should go!
Starlight Glimmer: Yeah!
Trixie: Come on!
Thorax: Let's go!
Discord: We must find out!
[They find the Cybertronian meteor]
Twilight Sparkle: Whoa!
Rainbow Dash: That's big!
Pinkie Pie: Really big!
Starlight Glimmer: Wait!
Trixie: It could be dangerous!
Thorax: You know it!
[The meteor starts transforming into a Cybertronian]
Twilight Sparkle: What the?
Rainbow Dash: What's happening?
Pinkie Pie: It's transforming.
Rarity: Into what?
Applejack: I don't know.
Fluttershy: Something bigger than it.
Starlight Glimmer: Wait! I know who that is!
Discord: He has hasn't even introduced himself yet.
[They see one part of the meteor transform into a tail]
Twilight Sparkle: Is that a tail?!
Rainbow Dash: Yeah.
Pinkie Pie: Whoa!
Rarity: That's a big fella!
Fluttershy: Really big!
Starlight Glimmer: Trypticon!
Trixie: The warship of the Decepticons!
Thorax: Megatron's most powerful weapon!
Discord: We battled him once!
[The meteor continues its transformation. It sprouts legs and arms and hands. The meteor completes its transformation with the head coming up and the yellow optics lighting up.]
Trypticon: I am Trypticon! I am your death! I live to serve Megatron and to destroy Autobots and Equines.