Stygian warned SpongeBob, Po and the others/Gathering their LEGO friends

Here is how SpongeBob SquarePants and Po gather their LEGO friends in The Overlord's Revenge.

Meanwhile, SpongeBob and all of his friends were having a great time together.

SpongeBob SquarePants: Okay, Everyone and Everypony, it's all in the technique! (starts doing his infamous routine) First go like this, spin around. Stop! Double take three times: one, two, three. Then pelvic thrust! Whoooo! Whooooooo! Stop on your right foot, don't forget it! Now it's time to bring it around town. Bring-it-a-round-town. Then you do this, then this, and this, and that, and-this-and-that-and-this-and-that, and then... (makes bubble arts of the beautiful butterflies that flew up to Flurry Heart as she giggles)

Patrick Star: Hey, guys! Watch me play a mean belly. (playing to the tune of "The William Tell Overture," with his belly to create a timpani solo and bows)

Suddenly, Stygian came and warned them.

Stygian: Stop the celebration!

Gandalf: What's wrong, Stygian?

Stygian: It's the Overlord, the Preeminent and Lord Vortech, they've returned!

Po: What, how'd they keep returning?!

Manny: That, Po, is what I'd like to know.

SpongeBob SquarePants: Well, he's not gonna crash this festival. (to Manny) Manny, can you, your herd, Star Swirl and the Pillars stay with Twilight and her friends and keep everyone and everypony safe?

Manny: You got it, SpongeBob.

Sensei Garmadon: Be careful, all of you. None of us know what they're planning now.

Sensei Wu: Are you certain you and your friends know what to do, Lloyd?

Lloyd Garmadon: I'm sure, Uncle Wu.

Shifu: Then do what you must, and stay alert. Go! Stop the Overlord, the Preeminent and Lord Vortech and send back to Tartarus!

So, everyone else instantly set off. Po makes to follow.

Po: Yeah! Let's go, let's... (stops) Whoa, whoa, whoa... how can we do this? How can we stop the Overlord, the Preeminent and Lord Vortech if we don't know what they're doing now?

Shifu: Remember, Dragon Warrior: Anything is possible... when you walk through the noble path.

So, SpongeBob, Po and the others gathered their LEGO friends to stop them.