Here's how killing the other villains and Tirek goes in Wrath of the Century.
[When Thomas lands they only find a few of the other villains]
Thomas: Cinders and ashes!
Discord: [as Hooper (in his version)] You think this is over? All your little stunts did was to buy them time!
Queen Chrysalis: You may of destroyed our army, but we will prevail but you won't!
[just then a Chinook Chopper flies in]
[it crashes onto the ground and its pilot reveals to be the T-850]
T-850: I'm back.
Nightmare Moon: You!
[then the door starts to close as the T-850 then jumps forward and it open]
T-850: GO!!! NOW!!!
[they run for it]
Cadance: Thank you.
T-850: We'll meet again.
Cadance: [nods and takes off running]
[but before she can escape Chrysalis grabs her tail]
Queen Chrysalis: You won't get away that easy! [pulls her back]
Twilight: [grabs Cadance and pulls back]
T-850: [grabs Chrysalis' tail, and pulls on her making her let go]
Queen Chrysalis: HEY!!! LET ME GO!!!
T-850: [opens his fuel cell and takes out the ruptured fuel cell and jams it in a main reactor] You are terminated.
[it blows up killing the other villains]
[but then who should Thomas' group meet but]
Tirek: Going somewhere?
Princess Celestia: Tirek.
Tirek: You may of beaten everyone else but you won’t get past me!
Percy: Oh yeah? We’ll see about that.
Brian: Let me borrow this for 5 minutes. [grabs Twi’s Lightsaber]
Twilight: Go ahead.
Brian: [activates it.] I’m getting my Lightsaber back!
Tirek: Come and get it. [activates a crossgaurd Lightsaber]
[And then Brian and Tirek clash sabers at different angles]
[Brian Force leaps back and then charges forward again, and they clash sabers again]
[the 2 then clash sabers with Tirek at several different angles but then Tirek shoots magic at Brian, sending him flying back and then he shoots another at him but blocks it away]
Tirek: You can't beat me, Snoopy. For I have the Purple Diamond! [shows the false one]
Brian: Sorry to tell you this, but that's not the Purple Diamond.
Tirek: Oh yeah? Watch as I will become stronger! [he then warms up his magic sphere above his head, ready to take the diamond's power but nothing happens] What? [he tries again, but still nothing] WHAT?! WHY WON'T THIS WORK!?
Brian: Like I said, that's not the real Purple Diamond, you have a fake one. [he then Force crushes the fake one] Now, you better surrender, or else.
Tirek: [growling] NEVER!!! I won't stop this until you're in your grave! [he then reactivates his Lightsaber]
Brian: I warned you. [he charges forward]
[but then Brian deactivates Twi's Lightsaber and then starts to shoot at Tirek, but Tirek deflects each of the shots with his magic]
[And then Brian and Tirek clash sabers at different angles]
[Brian Force leaps back and then charges forward again, shooting at Tirek and they clash sabers again]
Twilight: I never thought of that. [she then races forward and notices Brian's Lightsaber hanging from Tirek's hip] Time to join in the duel. [she then Force grab Brian's Lightsaber and activates it]
Tirek: [notices Twilight joining in] finally, a fight worthy of my time. [his lightsaber then deploys a second blade!]
[the 2 then clash sabers with Tirek at several different angles but then Tirek shoots magic at Brian, sending him flying back and then he shoots another at Twilight which strikes her!]
Twilight: AAAH!! [falls off the platform, dropping Brian's Lightsaber]
Tirek: [grins evilly]
Brian: That was a terrible mistake you just made.
Tirek: Why? Because you don't have anyone to die before you?
Brian: [Force grabs his own Lightsaber and he activates his and Twilight's Lightsaber] No, because I have nothing left to fear. And now, it's your turn.
[Brian then Force leaps forward and clashes sabers with Tirek]
[they continue clashing sabers as we then view Twilight on the lower platform]
[Camera pans back in the theater, where all of the pirates in the audience ]
Captain: That's the end of Twilight Sparkle. [To a pirate] Come here, you. [Hugs him tight when a parrot lands on his shoulder]
Captain's Parrot: *squawk* Shut up and look at the screen.
Captain: The bird's right. Look! [Camera goes back to movie to show the teardrop again] It's her royal assistant Spike.
Spike: TWILIGHT!!! [races up to her] Twilight! Are you okay? Twilight! Twilight! Wake up! [smacks her and Twilight start to awaken]
[The pirates and audience cheer]
Spike: Twilight, are you okay? Is Brian okay?
[Twilight then looks up and see Brian is winning in the duel against Tirek]
Twilight: Yeah. Actually, I think he's better than okay.
[Brian continues clashing sabers with Tirek as they approach the edge of the platform]
Tirek: You should not have come back.
Brian: Well, news flash Monkey brained, Centaur, I will allows return to help my friends no matter what the situation is!
Tirek: Well you’ll never stop me!
Princess Celestia: If you’re so powerful then why don’t you battle us all then? [grabs her Lightsaber and activates it]
Princess Luna: It is time to end this demon once and for all. [activates her Lightsaber]
Cadance: [activates hers]
Shining Armor: Finally, I get to get back at you for what you did to my wife! [activates his Lightsaber]
Sylveon: [Force deploys her Lightsabers and activates them]
Thomas: [deploys his Lightsaber]
Percy: [deploys his own saber and draws his energy axe]
James: Mind if we join in?
[James and Edward walk into view]
Princess Celestia: Gladly.
Thomas: Your rein of terror comes to an end now, Tirek.
Tirek: We will see. Thomas the Junk Engine!
[Thomas and Percy then activates their sabers as Tirek leaps forward and they start clashing sabers as “Anakin Vs. Obi-Wan / Battle of the Heroes” starts playing]
[as they continue clashing sabers, James then Force throws an object at a panel which opens another door to a huge room with lots of platforms and concrete pillars as well as other reactors]
[the battle continues down the platform as they start coming to a big junction in the middle of the room]
Princess Celestia: I’ll show you earth pony strength! [she then leaps up and then kicks Tirek in the face]
Tirek: GAAAH!! [some of his teeth fly out from the kick] (snarls)
[he then clashes Sabers again as he picks up Celestia with his magic and throws her against one of the pillars]
Edward: [cocks his Fusion Shotgun then fires, and the blast sends Tirek flying backward into another pillar]
Princess Luna: Move forward!
[they all slowly walk forward as Tirek then gets back up and starts running for them but Edward fires his Fusion Shotgun at him again, sending him back into the pillar]
[Then out of view, Team Griffin/Eeveelution are watching the scene]
Vaporeon: Man, Tirek's getting his butt kicked out there.
Latios: D'oh, screw it! We can't just sit here powerless!
Jolteon: You know he's actually got a point. I mean, if Tirek ain't Force Sensitive, why is he...
Bardock: Don't you start.
Latias: Hey, we've gone crazy! I mean we've been stabbed and blown up!
Glaceon: We've been stabbed and blown up to. And I've been dumped by the only boyfriend I'd ever had!
Flareon: Same here, But do you know the difference? When my girlfriend left me, she took all my money, when your boyfriend left you, he took all your money.
[Record player scratch plays]
Kida: Gonna need a Senzu Bean for that one.
[they continue slowly moving forward, as Tirek gets back up again and then he leaps forward and clashes Sabers again, and then he fires his magic at them, sending most of the team flying onto other platforms, and then he lifts up Brian and Cadance and starts chocking them as he then starts to make them bring their own sabers to their necks]
[but then, Ingator jumps in]
Brian: [choking] Ingator!
Ingator: [charges forward] YAAAH!!!!! [He then slams into Tirek, making him release Cadance and Brian aswell as drop his saber and he slams Tirek into several other smaller pillars and into one of the walls]
[then the dust clears and Tirek gets up, but notices his left horn has broken off]
Ingator: [grabs Tirek by the tail and spins him around and throws him onto one of the further platforms]
[Unfortunately, Tirek lands back near his Saber which he grabs and reactivates it]
[Brian then clashes sabers with him, as the others join back in as they slowly make their way on the platform]
[but then suddenly there's another blast as a blast strike Tirek in the left leg]
Vinny: What the? Who fired that shot?
[then we see the Predator standing a few feet away]
Tirek: A Predator?! [laughs] I would love to see a...
Predator: ROAR!!!! [activates his blade knuckles and slashes Tirek's chest several times]
Tirek: [yells in pain as the Predator slashes him]
Brian: You were right, I was a coward, but now I know there's something stronger than fear. Far stronger, the Force!
Tirek: (snarls and he is ready to clash again)
Brian: Let me show how strong it is! [he destroys Tirek's Lightsaber and does a powerful force blast]
Tirek: [tumbles on some pillars] DIE LIKE YOUR BROTHER!!!!
Brian: He is revived! [Punches him]
Percy: You think you can beat us?! Well, you’re wrong! Because we have something you don’t! [he then jams the head of energy axe in Tirek’s Left shoulder and then tears it off!]
Brian: [rips off his nose ring]
[then Sylveon Force Leaps towards him]
Sylveon: YAAAAAH!!!! [he then blinds Tirek with her sabers!]
Tirek: [as Muska] AAAAH!!! MY EYES!!! I CAN’T SEE!!!
Princess Luna: Good, because now you won’t see how we end your life! [she then stabs Tirek in the lower abdomen with her saber]
Shining Armor: [does the same thing]
Cadance: [throws her Saber into Tirek’s right shoulder]
Princess Celestia: [jumps up and stabs her saber in Tirek’s Stomach]
Ignator: [grabs one of the platform’s walkway poles and tears it out] Brian! [throws it and it then skewers Tirek in the neck]
Vinny: [boosts Brian up] Go Brian!
[Brian then leaps up and grabs the pole]
Brian: Your friends may have corrupted Celestia, Luna, and Cadance, Tirek, but now, you die! [he then grabs the pole and pushes with all his might, and then it decapitates Tirek!]
[Tirek’s body falls to the ground, as his head falls over the side and into the abyss below as his broken saber then lands into one of the main reactors, which triggers an explosion]
The Eeveelutions: Whoa!
Latias: Hey guys, what was the purpose of Jedi anyway?
Espeon: Who knows. Probably some hogwash about a samurai spirit.
The Eeveelutions: Yeah.
Jolteon: Sounds about right.
Princess Luna: Finally, the demon is dead.
Cadance: Yeah, but it won’t bring back Twilight.
Twilight: What are you talking about? [she walks up] I’m not going anywhere.
Brian: [hugs her] You’re alive!
Thomas: We thought we lost you.
Twilight: So did I.
[suddenly, a large slab of concrete lands on the platform behind them]
[then there’s another explosion as slabs of concrete start falling from the ceiling]
Percy: Yeow! What’s going on?!
Thomas: Our battle must’ve trigger an explosion from one of the reactors below!
[more slabs of concrete fall]
Ignator: And now the building’s collapsing!
Brian: Let’s get out of here!
[They then race out of the building as bigger slabs of concrete falls and the pillars start collapsing domino style, and they make it out, just in time. As the building then caves in and the whole place collapses in a big cloud of dust.]
[The dust then clears and there’s nothing left of the building but a pile of rubble]
Vinny: Man, that was way too close!
Thomas: Well, even if the villains survived, they won’t be getting out of there anytime.
Sylveon: Alight. Now, let’s go save Anna.
[But the Indominus Rex and Spino step in their way]
Indominus Rex: ROAR!!!!
Vinny: [sarcastically] Great.
[Then there was another thumping nearby. And the 2 dinos look and see Rexy coming up]
Indominus Rex: ROAR!!
[Soon the 3 start battling, but then Spino takes advantage by grapping her neck and slinging her around and is toss to the ground]
Brian: Oh, no!
Twilight: Oh, no!
The engines: Oh, no!
The royals: Oh, no!
[Then Kool Aid appears]
Kool-Aid: OH, YEAH!!!
[Everyone looks over as he slowly backs away]
Ignator: Alright, can we quit the "Oh, no's"?! I mean seriously there's always the Kool Aid guy when you say it!
[But before Spino and the I-Rex can finisah Rexy, there's another roar]
Russell Ferguson: I conizee that roar.
[then out from the trees, appears Blue!]
Blue: ROAR!!!!!!!! [hops on Knifestand's face]
Indominus Rex: [raors in pain as he tries to shake off Blue]
[then Rexy springs back up and bites Spino's neck and slams into the Indominus]
[The 2 badies tries hard, but both Blue and Rexy are too much for him as Rexy continues slamming Spino into buildings, as Blue stratches and bites the Indominus. And they are dragged to a coastline]
Indominus and Spino: ROAR!!!!
[Then the 2 are picked up by a large mouth, picking them up by the tail and get eaten. And it was... Godzilla!]
[Blythe and the pets run up]
Blythe: You and Blue did it! You where great.
Blue: You really think so?
Blythe: Oh, yeah. [then she is impalled by the shoulder and it is revealed the Queen!] AAH!!
Xenomorph Queen: You stupid insects! Trying to kill me!
Zoe Trent: Well, you're ugly and you are talking to us!
Xenomorph Queen: Well you are all gonna die, along with your Dinosaur friends, and Godzilla.
Russell Ferguson: Stand aside girl, don't make me hurt us.
[But there were Xenomorph drones behind her.]
Russell Ferguson: Me and my big mouth.
Xenomorph Queen: You are all outnumbered. And won't have a chance against them.
Xenomorph Queen: Duh, what?
Latios: You know if you miss your planet that much, we'll take you back.
Latias: We're not letting you kill the human race!
Xenomorph Queen: Try and stop us!
Bardock: Let's do it!
Team Griffin/Eeveelution: Right!
Xenomorph Queen: Kill them!
[The Xenomroph Drones charge and our heroes begin to fight them Power Ranger style]
["Aliens vs. Predator: Requiem - Requiem" starts playing]