This is how The ponies warn the Autobots goes in The Rise of Excelerator.
[The ponies come running into the base]
Rainbow Dash: Optimus! Bumblebee! Smokescreen! Bulkhead! Wheeljack! Ultra Magnus! Ratchet!
Optimus Prime: Rainbow Dash? Girls? What's wrong? Where is Arcee?
Applejack: She's gone.
Fluttershy: The Sirencons attacked us and took her.
Bulkhead: What do you mean gone?
Ratchet: And who are these ponies?
Night Glider: I'm Night Glider and this is Sugar Belle.
Sugar Belle: We're two ponies for Starlight's old village. Arcee risked her life for us to escape.
Ultra Magnus: Then what are we waiting for? Let's go after her!
[The Autobots all nod in agreement]
Rainbow Dash: Magnus is right. We have no idea what they might do to her.
Pinkie Pie: Then let's get out there and get our friend back!
Twilight Sparkle: Right. Before it's too late.
[Ratchet activates the Groundbridge and they set off]