The invasion was soon making its way closer to the Delightful Mansion. One part of the house soon became a rocket and flew to the Kids Next Door Moonbase.
"Ben, now's not the time to be a chicken!" Cherry told Ben as he was scared of facing his own father after all these years.
"She's right." Atticus said.
"Oh, I dunno, guys," Ben told them nervously. "Maybe I should've been on that ship. Pappy's gonna be awfully sore."
"Nonsense, Ben, we can still do this together; like we should've done all those years ago." Monty insisted as he held out his hand for his brother.
Ben soon accepted his brother's hand. With that, they soon went out to confront their father.
Cherry and Atticus soon joined them to see this up close and also because of their childhood memories.
"Well, well, well," Grandfather chuckled. "If it isn't my two boys and those urchins they were friends with? It's so good to see you."
Ben was about to say something.
"One of you anyway." Grandfather smirked.
"Oh, Pappy, that's not fair!" Ben complained.
"Ah, whoever accused me of being fair?" Grandfather crossed his arms. "Oh, Monty, if you could've been more evil... A little nasty, mildly unpleasant."
"Uh, your other son is pretty evil," Cherry smirked. "He can even master pyrokineisis... Street name: Firebending."
"She's right." Atticus said.
"Besides, I'm apart of this family too!" Ben added.
"Why don't you give it a REST?!" Grandfather glared and shot fire eyes towards them to throw them down by force.
"Uh-oh..." Ben gulped.
BOOM!
"You okay, Ben?" Cherry winced from the crash.
"You... Big... JERK!" Ben said slowly before he soon flamed in his own blaze, becoming his villain form.
"Oh, this will be entertaining." Cherry smirked.
"Now you've made me angry!" Ben roared at his father, becoming big and mighty with flames. "Very! VERY! VERY!-" he then shrunk down in defeat. "Eh, forget it... You can wrestle with Pappy yourselves, guys. I'm going to get some Rocky Road."
Cherry and Atticus had anime sweat drops in dismay of what Ben did next.
"Seriously?!" Atticus glared.
Grandfather laughed wickedly. "I'm getting tired of all this resistance, 'kids'," he then smirked to Monty, Cherry, and Atticus. "Why don't you behave for once in your lives?! Now, go get an old man that book~"
The three looked up at the moon before glaring at him.
"We are not moving from this spot!" Monty glared back.
"That's right!" Cherry and Atticus added.
Grandfather yelled out with a sharp glare. "You know what I did wrong last time?! I gave you all a choice about going to your room or being punished! I won't give you that choice again!" he then came towards the three adults, using his dark magic to age them.
Meanwhile...
"All right, with Sector Z fighting off the Senior Citizombies, and that'll leave us with just enough time to-" Numbuh 1 told the others as he ran with them on the KND Moon Base only to be stopped by his teammates who have been aged up.
"Whoa!" The Fudo siblings yelped.
"Welcome, Numbuh 1, as in one sorry son of a gun, and we're about to transform you and those recruits into one of us!" Numbuh 2 laughed.
"Augh, even as a Senior Citizombie, his lines still stink!" Numbuh 5 complained.
"Enough talk!" Numbuh 4 glared. "Let's destroyinate them!"
They soon started to fight.
"I'd love to try out my new move to take out for enemies at once, but not on you guys!" Numbuh 1 told his teammates.
"TOUGH!" Numbuh 5 glared as she came to tackle him.
Luckily, Numbuh 1 had teammates to help him.
"Abigail Lincoln, think about what you are doing!" Numbuh 1 nervously told Numbuh 5. "You're the one who got me into KND!"
"This has to be rough for him." Vincent frowned as he felt bad for Numbuh 1 to fight the teammates he had known for a long time now.
"Yeah." Akito added.
"Luckily we'll never have to fight the Loonatics." Vincent said nervously.
"Wally!" Numbuh 1 cried out as he had to fight Numbuh 4 now. "Who saved you from those bullies on your first day of school?!"
"That's old news, mate," Numbuh 4 growled. "As old as me!"
"Yikes." Estelle said.
"And Kuki!" Numbuh 1 cried out to Numbuh 3 before throwing her against what looked like a video game arcade machine.
"Ooh, that actually looked like it hurt." Felicity winced.
Numbuh 3 yelled at her and soon chased her. Felicity soon yelped before running. Akito looked around and Numbuh 2 was behind him, about to pound him with his fist.
"Oh, please." Akito scoffed as he caught the fist without even looking.
"Good thing we can take them on." Estelle said.
"Hoagie!" Numbuh 1 frowned to Numbuh 2. "You've been my best friend since Kindergarten!"
"GET OVER IT!" Numbuh 2 yelled at him.
"This is getting out of hand." Akito said.
A new boy soon broke through a window and came over. He had a flock of blonde hair with a red cap with a white T-Shirt that had the letter M on it, blue jeans, and white sneakers. He seemed to have his own weapons to help out the others. Felicity looked with Jenny and her cousins before they all looked curiously to the boy.
"Who is that?" Jenny wondered.
"I dunno, but he sure is mighty," Felicity shrugged. "Do either of you know him?"
The others just shrugged.
"Who are you?" Vincent asked.
"I'm Mighty Max," The boy replied. "And I think you all could use some help."
Estelle and Akito soon gasped out of excitement as they knew him.
"May I?" Mighty Max asked.
"Go right ahead!" Akito and Estelle smiled to him in unison.
"Heh, no problem." Mighty Max chuckled as he cracked his knuckles.
"Am I missing something here?" Vincent asked before getting grabbed by Estelle.
"Vincent, that's Mighty Max!" Estelle told her oldest brother.
"Yeah, so...?" Vincent asked.
"You have no idea who Mighty Max is?!" Akito gasped.
"Now... Should I...?" Vincent asked.
"That hat is very important to him, Vincent, it gives him all sorts of amazing powers." Akito said as he pointed to Mighty Max's red cap as the blonde boy fought the zombified members of Sector Z without breaking a sweat.
"What kind of powers?" Vincent asked.
"Oh, just about anything, like portals." Estelle smiled.
"That's impressive." Vincent said.
"If only we had more team to back us up." Numbuh 1 said.
"Well then," The short blonde boy of Sector Z soon came with the others after they helped hold off the Senior Citizombies. "Good thing we're on your team now, huh?"
The missing sector of KND History soon jumped in to help Mighty Max which made this battle even more epic and cooler than it already was.
"Shall we?" Estelle asked.
"Let's do this, Sis." Akito smirked.
The kids then activated their Loonatics bracelets and began to help fight like they used to in Acmetropolis.
"This is gonna be... Delightful." The blonde girl smirked.
"Oh, yeah, it is." Estelle nodded.
Sector Z soon began fighting which showed that they hadn't lost their touch even as Father's forced children.
"Time to get this show on the road." Numbuh 1 said as he typed into the keypad.
The computer soon had the target neutralized and for the coordinate code to be put in. The moon soon began to spin through space during the fighting.
"This is so amazing!" Akito smiled.
"Just a little more..." Numbuh 1 said to himself.
Numbuh 2 soon came behind him as Numbuhs 3, 4, and 5 were piled up thanks to Sector Z.
"Oh, no, you don't!" Vincent glared at Numbuh 2.
"Hey, Tapioca Tush!" The tall boy of Sector Z called out before throwing his weapon.
CRASH!
"Catch." The boy smirked.
"Ooh, my liver spots..." Numbuh 2 mumbled before falling down by a closet door which opened and showed umbrella hats.
"Thanks, David," Numbuh 1 smiled. "I don't know what I'd do without you guys."
"Is it almost in position?" Estelle asked.
"Just about." Numbuh 1 smiled.
'Akito, when you can, ask Sector Z for their names so I can track down their family members who have lost them a long time ago.' Atticus's voice said in an ear-piece of Akito's Loonatics uniform.
"10-4, Dad." AKito smiled before soon looking to Sector Z.
Back on Earth...
Cherry, Atticus, and Monty did their best to hold off Grandfather before he would transform them.
"Your resistance is impressive, but pointless," Grandfather smirked. "You cannot withstand my Senior Citizombification any longer! Even you, my son, are zero compared to me!"
"Oh, please, we've faced worse than you." Cherry said, referring to herself and Atticus.
"I may be a zero, but my son is number one!" Monty added firmly.
"Yeah!" Atticus added.
"All right, put these hats on my teammates," Numbuh 1 told the others as he brought out the umbrella hats. "It'll help change them back."
"Are they fully operational?" Mighty Max asked.
"They have to be, it'll help change my teammates back faster, and I just hope that your parents and my dad are okay down there." Numbuh 1 told him before talking to Akito, Estelle, Felicity, and Vincent.
"I may not know Detective and Mrs. Fudo well, but they're impressive people," Jenny replied. "They had Akito, Estelle, and Vincent after all."
"Yep." Vincent nodded.
"Why, Vincent even saved my life." Jenny smiled.
"Oh, uh, I don't know about all that..." Vincent smiled back, blushing from her smile.
"But it's true." Akito said.
Vincent shuffled his foot shyly.
With the umbrella hats on, the members of Sector V were slowly turning back to normal.
"Target ready in range!" Numbuh 3 giggled.
"I can't believe she's older than us." Felicity said about Numbuh 3.
"Uh, guys?" Vincent spoke up as he noticed something.
"What is it, Vincent?" Jenny asked.
Vincent soon pointed to Sector V. The others turned to Sector V who should be back to their old selves thanks to the umbrella hats, and which they were... Well, at least half-way. Numbuh 2's legs still seemed feisty and kicking.
"Kick me all you want, it won't hurt." Akito said.
"Sorry, kid." Numbuh 2 said since he couldn't control the lower half of his body.
"Let me guess, that half is still evil?" Akito guessed.
"Yeah, uh, sorry." Numbuh 2 smiled nervously.
Soon enough, the launch began for Earth, making the whole base shake in space.
"HANG ONTO YOUR UNDERWEAR!" Numbuh 2 told the others.
The tall girl and tall boy of Sector Z soon held each other in fear. Estelle could see a spark between them.
Cherry, Atticus, and Monty soon looked like they were going to be aged as Grandfather proved to be stronger than the three of them all combined.
"How can you resist me for so LONG?!" Grandfather glared at them.
"Simple, Dad!" Monty grunted. "That book you're looking for is in my back pocket!"
'And that should distract him long enough.' Cherry thought to herself.
"YOU HAVE THE BOOK?!" Grandfather glared.
"Gotcha~" Cherry and Atticus smirked innocently.
"Give it to me!" Grandfather raised them up and shoved them down on the ground. "Give it! Give it! At last, my victory is complete!"
The zombies then cheered with him in victory. Atticus, Monty, and Cherry soon ran off as they knew what was coming to crash down.
"With the destruction of the book, I will rule the Earth, unchallenged!" Grandfather grinned. "And nothing will ever stop me, ever again!"
Everyone huddled together as it looked like they were going to crash on Earth.
"Not even-" Grandfather smirked until his eyes widened. "A gigantic flying Moon Base...?"
The zombies soon ran for their lives.
BOOM!
The zombies soon swirled around from the impact almost like a tornado. The Moon Base soon crashed and laid on the ground, nearly destroyed.
"I hate everyone." Ben groaned as he sat in his table with a tub of chocolate ice cream.
The short girl of Sector Z hung on and she looked amazed and had a lot of fun. "You guys gotta try this." she then giggled.
"You remind me of Chip." Felicity giggled.
"Good job, team-AUGH!" Numbuh 1 smiled only to be kicked by Numbuh 2. "AND ENOUGH WITH THE KICKING ALREADY!"
"That... Was... AWESOME!" Mighty Max said before laughing in excitement.
"Yeah, it was." Akito smiled.
Mighty Max smiled and high-fived with Akito, but winced slightly and shook his hand.
"Oops, sorry about that, Max." Akito said, forgetting about that.
Atticus, Cherry, and Monty soon came for the code module and Grandfather came back for them.
"Children, children, children," Grandfather smirked to them. "Did you honestly think that 39 billion tons of hot metal and duct tape would crush me?"
"Eh, not really, sir," Cherry replied. "We just wanted to see what would happen if an adult got into a decommissioning chamber."
Grandfather soon gasped as he knew what that meant.
"NOW, NIGEL!" Monty signaled his son.
Numbuh 1 then threw the switch.
"You're out of my will, you brat!" Grandfather glared.