A rescue mission for the princesses/Heading to the castle

Here is how the rescue mission begins in The Overlord's Revenge.

At last, Po, SpongeBob, Shrek, Mr. Wolf, Spyro, Crash, Emmet, Wyldstyle, Batman, Gandalf, Laval, Clay, Lloyd, Tim, Theodore, Tina, Tabitha and the others begin the rescue mission for the princesses when they came to Canterlot.

SpongeBob SquarePants: I hope we'll succeed our mission soon.

Machia: Not to worry, SpongeBob.

SpongeBob SquarePants: Machia, what're you doing here?

Machia: Well, I've come to help you with a project.

Po: What kind of project?

Lloyd Garmadon: I think we're about to find out.

Tigress: What do you have in mind?

Machia: I'll show it to you.

Po: Good thing she's on our side.

SpongeBob SquarePants: It sure is, Po.

Machia: Before we came to the past, I stole these.

With that, Machia brings out the blueprints and it shows the Super Iron Doom instructions.

Lloyd Garmadon: It's the blueprints to the Iron Doom!

SpongeBob SquarePants: Yup, is that all you got, Machia?

Machia: Only this is a Super Iron Doom. It's like the Iron Doom, but with wings on the back and a horn on the head.

Spongebob Squarepants: I don't know what the Overlord's up to, but we've gotta stop him, the Preeminent, Lord Vortech and the Storm King!

Queen Novo: Well then, what're we waiting for?

Tina Templeton: Uh, Squidina, do you have the diaper bag you borrowed from my mommy?

Squidina Star: Yeah, why's that, Tina?

Tina Templeton: Because I'd just made a boom-boom.

Everyone: (goaning in disgust)

SpongeBob SquarePants: Ew!

Donkey: That is nasty!

Tabitha Templeton: I'll go help with the clean diaper.

So as Squidina gets Tina changed, SpongeBob gathered the rest of his friends as he explain the plan.

Along the way, they have to fight off the Storm and Stone Armies to get to the princesses.

SpongeBob SquarePants: (puts on his karate gear) Safety first.

Batman: Ready when you are, SpongeBob.

SpongeBob SquarePants: Time to save Equestria!

Then, they started battling the Stone and Storm Armies.

Po: SpongeBob, duck!

SpongeBob SquarePants: (ducked as Po kicked on Storm Guard) Thanks, Po! (took out one Stone Guard)

Sandy Cheeks: Time to take it up a notch.

Tigress: Then, what'er we waiting for?

Batman: Let's kick some blocks!

Emmet Brickowski: Awesome phrase!

Lloyd Garmadon: Ninja go!

Then, they kept on getting close to Canterlot and to rescue Twilight and the princesses.

Elsewhere, the Overlord arrives in a mech shaped like the Iron Doom called the Super Iron Doom.

The Overlord: I see your friends have come to rescue you.

Twilight Sparkle: You know it, Overlord!

Princess Celestia: Once they're threw with you, you'd be turned to stone for good!

Then, the Overlord uses the Super Iron Doom mech to grab the weakened princesses by their tails.

The Overlord: Here are the terms of surrender, princesses. Bow, and we'll destroy the heroic alliance, but spare the citizens. Refuse and we still destroy the heroic alliance, but the citizens will not be spared.

Princess Luna: We will never bow to you, Overlord!

Princess Cadance: Neither will we bow to the Storm King!

The Overlord: Then say goodbye to your subjects.

Soon, the Overlord starts to try and destroy them when Po beat him to the ground giving SpongeBob the chance.

Po: Now, SpongeBob! Restore their magic with your Chi!

SpongeBob SquarePants: On it!

At last, SpongeBob used his Chi Technique and restore their alicorn magic.

Just then, Lord Vortech witnessed what he's seeing.

Lord Vortech: What is it?

The Overlord: The First Spinjitzu Master. He's near.

Soon, the First Spinjitzu Master make ready to face the Overlord once again.

With that, the Overlord was about to make ready shroud the multiverse in darkness.

The Overlord: I am going to make them suffer, First Spinjitzu Master, these other beings you care about. I will take them all from you, one by one!

The First Spinjitzu Master: You're a monster, Overlord. And I'm going to stop you.

At last, the First Spinjitzu Master and the Overlord begin their duel.

The Overlord: There is only one way this war ends, old friend. Either you fall or I do.

Then, they used their spinjitzu as they all clashed together.

The Overlord: I was meant to be a warrior, old friend. Trained my entire life to master my senses. Where did you train? In a realm only filled with war?!

As the battle begins to go one, they fought endlessly for a colliding multiverse.