Here's how Brian's argument goes in The Day the Griffin's Came Part 2.
[Previously on The Chronicles of Equestria and The Isle of Berk]
Brian: There's one hope. Equestria.
Princess Luna: Who are we in the presence of?
Brian: I am Brian Griffin. We are from Quahog.
Cadance: Impossible, Quahog is ruin for a millenium.
Brian: It is a ruin for a millennium.
Brian: Fear not, we all know tomorrow is Thanksgiving day. So tomorrow, instead of having a turkey, we're gonna have a DRAGON!!!!!!!
[The real episode plays]
[Brian then goes to see the royals again]
Brian: I knew you were hiding something! No wonder you couldn't help us, you care about them.
Princess Celestia: I couldn't bare to kill another dragon if it means rebuilding your home! And now you have my neice's Night Fury!
Brian: The dragon? This is who you're worried about? And not the Fire Drake that killed hundreds of us!?
Princess Celestia: And we've killed thousands of them!
Princess Luna: Brian, she's not dangerous!
Brian: Dangerous?! [scoffs] I don't think so, if your daughter gets in the way, she'll die as well!
Princess Luna: NO!!!!
Brian: It's her warning! And, I know. You were all responsible of Smaug's destruction! And now, all Quahog is burning because of you!
Yuna: Dragons are kind!
Brian: You idiot!! Dragons are not kind, there monsters! [grabs her by the throat] Monsters are no capable of being friends! [lets her go] At sunrise, the Night Fury will die! [leaves the throne room]
Sharon: Mother, what should we do?
Princess Celestia: I don't know.
Yuna: I don't want him to kill Nightstar!
Princess Luna: Don't, worry, we'll think of something. [to one of the guards] Head to Berk and aleart Stoick.
[Meanwhile, Smaug awakes and heads to Equestria]
Smaug: I am fire, I am... death!
[we then see him flying towards Equestria]
[the guard then races in and heads up to Stoick]
Royal Guard: Cheif Stoick, we request your assistance in Equestria. Princess Yuna's Night Fury is in danger of being killed!
Stoick: Take me there at once! [to Gobber] Round up everyone, and aleart Hiccup!
Gobber: Right away!
Brian:It's nearly there.
[Brian looks back is meet by Hiccup and the others]
Hiccup: Dragons are harmless.
Brian: Why? Because you're friends with them too?
Hiccup: Yes, let me show you.
Brian: No! Don't show me anything. [throws a PokeBall showing Metagross]
Brian: Metagross, use Pshychic so they won't stop me.
Metagross: Meta! [uses psychic]
[The others can't move]
Skyla: What's he doing?
Nyx: It's pshycic!
Brian: Say your prayers to the dragon.
[Brian then heads to the cemramony]