Here is how Po, SpongeBob and the others fight the Storm King in The Overlord's Revenge.
Soon enough, Po, SpongeBob and the others begin their fight with the Storm King.
SpongeBob SquarePants: Now, let's take down the Storm King!
Po: Alright, SK, you ready to feel the thunder?
The Storm King: Well, I was about to ask you the same thing!
The Overlord: Destroy them!
The Storm King: With pleasure!
The Storm King begins his fight, Po avoid getting hit as the Ninjas, the Nexo Knights and the Chima Heroes joined in.
Twilight Sparkle: They'll need our help!
Star Swirl the Bearded: Then let's put a stop to his evil for good!
Princess Celestia, Princess Luna and Princess Cadance joined in as Twilight and the others help them out.
Lloyd Garmadon: Ninja go!
Clay Moorington: Nexo Knight!
Laval: For Chima!
Eris: Let's take him down!
Harumi: (as the Lady Iron Dragon) Once and for all!
As they fought a couple of Stone Warriors that stands between them and the Storm King, SpongeBob tries to take his staff.
The Storm King: Oh, no, you don't, Yellow boy!
SpongeBob SquarePants: (grabbing his staff) Yes, I do, Storm King!
The Storm King: Let go!
SpongeBob SquarePants: No!
Then, SpongeBob struggles to keep his grip tight enough until finally, he took the Storm King's Staff was destroyed for good.
The Storm King: No! My staff!
With that taken care of, Twilight, Star Swirl and their friends turned the Storm King to stone for good.