The George and Harold, PJ Masks Power Hour

The "George and Harold, PJ Masks Power Hour" is the first crossover special between The Epic Tales of Captain Underpants and PJ Masks.

Plot
A chaotic duel with characters from The Epic Tales of Captain Underpants and PJ Masks erupts when George, Harold, Mr. Krupp and Erica got sent to a other dimension which just happens to be in Tarabiscoville, The PJ Mask's HQ, but Catboy, Owlette and Gekko accidentally teleports themselves into George and Harold's dimension. Now the heroes are stranded in each other's worlds. Now George and Harold must shut down PJ Robot, who George uploaded a destructive video game into, before he destroys Tarabiscoville. Meanwhile, The PJ Masks must stop Melvin Sneedly from taking over Piqua.

Synopsis
George and Harold haven't done their science fair protect yet, so they decided to use Melvin's new inter-dimension laser for the fair, but the laser zaps George, Harold, Mr. Krupp and Erica, George, Harold, Mr. Krupp and Erica now appears in a PJ Masks animation style, arrives inside PJ Masks's HQ in Tarabiscoville. The PJs who have reluctantly defeat Octeobella until George and Harold drops in and mess with the stuff they have. Catboy, Owlette and Gekko accidentally uses Melvin's Teleporting Pen, causing them to disappear to Piqua Ohio.

Exploring the HQ, George finds PJ Robot in the middle of an automatic tune-up and, mistaking him for a video game system, and foolishly downloads the video game Decimator into PJ Robot's hard drive. Then, George, Harold, Mr. Krupp and Erica try to drive the Cat-Car but only crashing into the school. The next morning, George, Harold, Mr. Krupp and Erica had got out the car, Cameron arrives and thinks George, Harold and Erica are Connor, Greg, and Amaya and trys to tell the teacher on George when George talks back. George then using his hypnotizing device to hypnotized Cameron and making him think he is Colonel Urinal.

While Harold and Erica exploring the school, George drives the Cat-Car to the gas station for some gas, meanwhile the Decimator video game finishes downloading and transforms PJ Robot into the title character. PJ Robot escapes the HQ and starts chasing after Mr. Krupp. Meanwhile back in Piqua, Catboy Owlette and Gekko now appear in a Captain Underpants animation style, meets George and Harold's friends, Gooch, Dressy, Jessica, the Sohpies, Bo, and Slantey, which they the PJs are inter-dimension travelers.

However, the teachers and the other kids mistaken the PJs for George, Harold and Erica (due to thinking they are in costumes). They get fed up with the place, and decides to use the Teleporting Pen. Melvin sees them and he plans to steal their powers. When Catboy, Owlette and Gekko got a game buddy attached to the pen and about to go home, Melvin snatches it from Catboy's hand and steals their powers and put them into his DNA.

Back in Tarabiscoville, George got gas for the Cat-Car, Harold and Erica came to warn him that about a robot attack. They show him what's going on, but George don't listen and proceed to finish using the stuff. Harold and Erica then decide to stop PJ Robot themselves. Harold turns Mr. Krupp into Captain Underpants, but they are unsuccessful and PJ Robot becomes ginormous and chases after the kids.

They run to George and warn them that PJ Robot is after them, but George STILL doesn't care and thinks it's not a big deal. PJ Robot arrives and shoots them with flames, though they remain unharmed, just black with soot. George now sees that the game is getting out of control. He tries to get home to get the others for help. but he, Harold, Erica and Captain Underpants are instead eaten and trapped inside of PJ Robot. They uses the frequency of one of Romeo's laser pens which Harold mistook for Melvin's pen to get to PJ Robot's central core to deactivate him.

Back outside, PJ Robot targets the sodafactory and decides to destroy it. George, Harold, Erica and Captain Underpants got to the disk drive and they arrive, just as PJ Robot is about to destroy the town with his rockets. However, the laser pen runs out of power, so Captain Underpants uses his power-punch to smash through the system and shuts the game down, causing PJ Robot to deactivate and the town is saved.

Just then, PJ Robot shrinks and returns to normal. With PJ Robot back to normal, Connor, Greg, and Amaya makes contact them informs George and Harold that Melvin has their powers.

Melvin began a reign of terror to the town by using the PJ powers for evil, Connor, Greg, and Amaya retrieve the teleporter from Melvin and nearly leaves everyone behind. But George uses PJ Robot to help Connor, Greg, and Amaya understand what everyone mean to him, Harold, Erica and Captain Underpants, and Connor, Greg, and Amaya decided to stay and fight for Piqua. They use a robot-suit and battle Melvin and take back his power-stealer ray and restore their powers, returning them back to the PJ Masks. Melvin gets hit by a flying pan by Bo and the day is saved. PJ Robot uses an inter-dimension portal to returned George, Harold, Erica, Captain Underpants, Catboy Owlette and Gekko to their home towns and the 6 kids shake hands and make amends.

Back home, George and Harold realizes they still never found time to finish his science fair project. On the verge of being disqualified, the PJ Masks uses the portal and sends PJ Robot to Piqua. The boys win the science fair and thanks the PJ Masks for their help.

PJ Masks Characters

 * Catboy
 * Owlette
 * Gekko
 * PJ Robot (briefly becomes the Decimator when George inputs the software info PJ Robot)
 * Octobella (mentioned)
 * Cameron (later was hypnotized by George and Harold to think he was Colonel Urinal)

The Epic Tales Of Captain Underpants Characters

 * George Beard
 * Harold Hutchins
 * Captain Underpants / Benjamin Krupp
 * Erica Wang
 * Melvin Sneedly
 * Steve Yamaguchi
 * Dressy Killman
 * Bo Hweemuth
 * Jessica Gordon
 * Sophie One
 * Other Sophie
 * Stanley Peet
 * Ms. Anthrope (cameo)
 * Mr. Meaner (cameo)

Cast

 * Evan O'Donnell as Catboy/Connor
 * Addison Holley as Owlette/Amaya
 * Benjamin Hum as Gekko/Greg
 * Juan Luis Bonilla as PJ Robot
 * Nat Faxon as Captain Underpants/Benjamin Krupp
 * Jay Gragnani as Harold Hutchins
 * Ramone Hamilton as George Beard
 * Jorge Diaz as Melvin Sneedly and Stanley Peet
 * Erica Luttrell as Erica Wang
 * Dayci Brookshire as Jessica Gordon and Dressy Killman
 * Evan Kishiyama as Steve Yamaguchi
 * Brennan Murray as Bo Hweemuth
 * David Koechner as Kenny B. Meaner
 * Luxton Handspiker as Cameron
 * Sean Astin as The Narrator (2-D) Segments