Disclaimer: I do not own ROTG or Phineas and Ferb

Arriving back in their world was a bit disorienting. Jack didn't quite know where they ended up, only that it was back home once more. "Looks like we're home!" Phineas announced, recognizing the park in Danville. Baljeet and Buford were sitting on the bench in front of them, watching as they returned through the portal.

"Where have you guys been?" Buford asked, upset that they had given up in their game. While it was satisfying to win, Buford did not like people who gave up in games. It wasn't a respectable action in his mind.

"We've been in another dimension!" Phineas said proudly, before remembering that they brought someone extra back with them. Jamie was staring at the park with wide eyes, not used to seeing so much color and life in the city he lived in. Most places were industrialized, with smoke clouding the sky and buildings replacing all the trees. This was so natural, he couldn't stop staring at it in amazement.

"Pretty cool, huh kid?" Jack asked, seeing his expression. Jamie nodded, still staring at the park.

"What's with him?" Buford asked, noticing the strange new kid.

"Oh, he's from the other dimension. We need to get him back home and-" Phineas cut himself off, glancing towards the sky. They had a bigger problem than Jamie right now. Above them, robots were beginning to invade the city. "Oh no! Doofenshmirtz must have gotten his portal to work." Phineas complained. He knew that the Doof from this dimension had remembered how to fix the machine, but Phineas had hoped that something would still go wrong. Now, they had to stop the robots from taking over this dimension.

Pitch knew it was bad, feeling his power slowly increase. He wasn't even doing anything, but the robots were inspiring enough fear to empower the spirit. "Jack, this is bad. If they win, the Guardians will vanish without me doing anything. Already, I can feel more children believing in me." Pitch told them, glancing at the sky. Jack looked over to him, now able to see the man as a friend and an ally. If he was growing stronger, Jack knew he was right and that children were losing belief in the Guardians as these robots destroyed their home. All of the fear would create belief in Pitch, destroying their hope and wonder of the world.

"Agent P! We are at an emergency level alpha red and we need you to stop these robots!" a voice said, coming from some device on the the platypus' wrist. Jack got closer to it, interested in what it was doing.

"Why is Perry wearing a hat?" Baljeet asked, already moving on past the robot invasion. He couldn't do much about it, so he was focused on what was going on with his friends.

"We don't have time to explain!" Phineas said, leaning down and watching the man in the monitor.

"What can we do to help?" Phineas asked, wrapping an arm around his pet. Things had gotten much better between them, now that Phineas had gotten used to the fact that Perry was a secret agent.

"You kids need to go home, where it's safe!" Major Monogram said sternly, not willing to take the risk. Jack snorted, shaking his head at the hologram.

"Really? Either he gets attacked by these robots at home or he fights them in the street. Seems like it is just as safe out here as it is where he lives." he commented, but Monogram didn't believe in Jack Frost, so his comment was ignored.

"We've been through a lot together and we're a team now, sir." Phineas argued, but was once again shot down. When even Perry walked away, Phineas realized that he really was stuck with just going home.

"Jack, what is that?" Phineas asked, noticing something in the sky that wasn't a robot. It seemed to be getting closer to the ground. As Phineas stared at it, a large boomerang came flying out towards the robot army, destroying a few of them as the contraption flew across the sky.

"North! It's about time you guys got here!" Jack yelled, flying up towards the sleigh. Pitch shrank back, not certain of how well the Guardians would react to seeing him here.

"Jack, it is good to see you!" North said, landing the sleigh next to him and walking towards the winter spirit.

"Oh, these must be the Guardians from our dimension." Phineas said, realizing who they were. Jamie was staring at them in awe as well, remembering how awesome they had been back in his world. He couldn't wait to see what they could do here.

"Jack, he sees you." North said, surprised to find someone who believed in the winter spirit.

"Yeah, he does, but right now we've got bigger issues than him. Pitch says-" Jack began, realizing his mistake almost immediately.

"Wait, Pitch? You vanished into thin air, once again, just to spend more time with Pitch?" Bunny asked, glaring at the winter spirit and stepping forward, ready to fight.

"Guys, it's not like that! Pitch is only-" Jack began, before Pitch Black himself stepped forward and interrupted the winter spirit.

"Jack, that is enough. They have every right to hate me and you will only make things worse for yourself." he said, deciding to be brave for once. He always hid behind his power, allowing nightmares or darkness to protect him. This time, Pitch planned on defending the one person who was willing to trust him, to be his friend. It was something worth fighting for, in Pitch's mind.

"No way! I'm not going to stand here and let them treat you like you're our enemy! Right now, those robots are the problem, not you." Jack argued, glaring at both Pitch and the Guardians.

"Hey, Jack, this isn't really helping anything." Jamie said, stepping closer to the winter spirit. Robots were coming even quicker now, swarming the entire city and terrorizing everyone. Jamie could hear people screaming as they were cornered by the norm-bots, forced to be measured for dooferalls and gather together to meet their new leader.

"Right, what to do?" Jack asked, glancing at the sky above him. They didn't stand a chance right now, not with the Guardians too focused on Pitch to fight back against this evil scientist.

The children might be able to do something, but there were only six of them. It wasn't nearly enough, not when facing an army of this size. That gave Jack an idea, however, one that gave him a mischievous grin as he thought of what he had to do to accomplish his goals. "Hey, Jamie, how would you like to meet this world's version of you?" Jack asked, glancing towards the kid. North was too busy yelling at Pitch to notice what Jack was doing, so he had to act quick.

Jamie nodded, feeling excited and nervous at the thought of meeting himself. Would he be the same person in this world? Did this other Jamie believe in the Guardians? Clearly, Jack seemed to know him, but that didn't mean that Jamie believed. "Come on, let's go before they see us." Jack said, flying over to the sleigh. It couldn't be too hard to control. He would use the trip to Burgess to figure out how to fly it before bringing the kids back. Grinning, Jack decided that he liked this plan whether it worked or not. Stealing North's sleigh was an awesome prank on its own, bringing plenty of fun for the winter spirit and Jamie. Together, they both climbed into the sleigh and took off, heading towards Burgess to get children who could help them fight back against this new threat to their world.

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