AN: I give credit to the great Marc Gallager of YouTube's Harry Potter PS1 for the base inspiration for this variation of the main story.
"Are you sure this is the place?" Dexter Grif asked as he and his team dug through another round of rock.
"Of course I'm sure!" Percy Jackson shouted back as he struck his pickaxe, flinging it back to kick up another mound of dirt. "It would go faster though if you'd help us out!"
"I have been helping!" Grif protested, gesturing to the mound of dirt at their side. "I've been guarding the dirt here!"
"Yeah, because it'll come alive and try to eat us." Harry Potter grunted, wiping another bead of sweat before going back to it. Three years into Beacon Academy really did a number on all four of the boys, even Grif had lost most of his weight.
"Well, technically," Izuku Midoriya said but was interrupted by the sounds of yelling.
"The girls are inside!" Percy said. "Hang on, babe! We're almost there." Percy struck the earth one last time, the earth giving way. "Here!"
"Get back!" Midoriya said, green lightning arching through his leg as the roof the cave gave in, showing a single light.
"Serious question here. Do you have a fetish for green or something?" Grif asked as he climbed down into the cave.
"Shut the fuck up, Grif." Midoriya said as he leapt on down, followed by Grif, Percy then Harry. The room was cylindrical in shape with a single lamp illuminating the space and next to the lamp was a tied up team RWBY.
"Hang on." Percy said, running over to Yang and untying her first.
"Oh, Percy." She said, wrapping her arms around him and kissing him tightly. In the corner, Weiss rolled her eyes as Harry untied her as well.
"What happened?" Grif asked, looking throughout the cave.
"We don't know." Ruby said once she was untied. "We all went to bed one night then the next thing we know, we're tied up inside a cave."
"Did you see who it was?" Percy asked, pulling out Riptide and holding it tightly.
"That would be me." The eight turned to the source of the voice. Stepping out of the shadows was a tall skinny man in black armor with a black visor with three white stripes and a white skull in the center of his breast plate. What stood out from the dark attire, though, was the familiar billowing red cape behind him.
"Hey! Give me back my cape!" Ruby shouted trying to get up but the man held up a gun.
"Don't try anything there, missy." He said.
"Why not? We outnumber you eight to one." Yang said, raising her fists.
"Yes but look around you closer. What do you see?" He asked. They did so.
"Rock, rock and more rock. What are you getting at?" Percy demanded.
"Oh fuck." Grif said, stopping before looking back at the man. "You wired this place to blow."
"Aye, I did. Unless you hear me out first."
Harry pulled out his wand. "Trust is a two-lane road. Show yourself."
The armored man chuckled. "Oh, Harry. Still so untrusting." The man grabbed his back helmet and pulled it off, revealing…
"Ron?" Harry asked, dropping his wand in shock.
"How ya doing, Harry?" Ron Weasley grinned back, holding his helmet at his side.
"Ron? As in Ron Weasley?" Weiss said, placing her arms at her hips and staring at him closer. "You don't look like much."
"Hang on. I got a better question at this moment." Harry asked. "How are you here? What did you want with the girls?"
"Oh, the girls were a means to an end." Ron said, waving his other hand dismissively. "It's you lot I wanted to talk to." He pointed to the boys.
"Yeah? What do you want with us?" Grif asked, stepping in front of the group.
"Why, I wanted to bring you into the fold!" Ron said, pumping his fist that held his helmet. "I represent a group of men who work night and day to maintain managed democracy across the entire universe!"
"…What?" Midoriya asked, tilting his head in confusion.
"Every day and every night, those filthy bugs and automatons come knocking on our doors and now with a new threat coming to consume us all, we need every able-bodied man to come to the cause."
"Just the men?" Blake asked, sounding annoyed.
"What bugs? Shouldn't you be more concerned with the Grimm?" Ruby asked, confused. That is, until Weiss slapped her upside the head.
"You're not taking this seriously, are you?" Weiss asked.
"I'm dead serious." Ron said. "Trust me, I was in your shoes when I was brought to Super Earth but now, they need my help and they sure as shit need yours after years of being in this thing. They make these Grim-shits shit." He turned to Harry. "Come on, Harry. We've known each other since we were kids haven't we?"
"You're really doing this?" Harry asked, annoyed. "Using our friendship in this way? Well, I won't stand for it. What happened to you, Ron?"
Ron frowned. "I changed, Harry. All those years, I was jealous of you wanting to be like you, battling evil." He pulled out a clicker and pressed a button. A screen illuminated the wall, showing a desert landscape at night with humanoids with glowing red swords.
"Whoa! Are those lightsabers?" Percy asked. Then they saw a group of men dressed in Ron's attire, firing rifles, rockets, any matter of weapons conceivable into the blitz of robots, the facility eventually exploding.
"I found my purpose with the Helldivers. They've given me a chance to be great and now, I offer that chance to you."
Silence filled the chamber, broken by a loud echo making the walls shake.
"HERE THEY COME!" Ron shouted, putting his clicker back on and pointing his gun behind him before firing it. Masses of chittering echoed throughout the walls and four-legged bugs started crawling towards them, armored bugs with red highlights and yellow bellies.
"We're all going to get you!" Grif shouted, firing his Grif shot followed by everybody with their weapons.
"Why do I feel like I'm going to regret this?" Harry asked himself, pulling out his pistol and blasting the face off a particularly big bug.
"I so do not regret this!" Harry Potter said, looking down at his helmet with green highlights. Fourth dive as a Helldiver in exchange for their girlfriends' safety, what more could you ask for? And to think a portal from Remnant to this world being right under their noses, who would have guessed?
"I know. I feel like I'm back doing what I do best." Percy asked, having already geared up with Riptide by his side. Killing ten Helldivers in one live fire training accident gave him that little bit of permission.
"No Death Eaters to contend with."
"No monsters."
"No Voldemort."
"No Kronos."
"Hey, stop sucking each other's dicks!" Grif said wearing orange extra padded Helldiver armor to contend with his remaining fat with a red visor.
"Yeah! You got Yang at home for that." Midoriya agreed, holding his green Helldiver helmet at his side.
"Shut up!" Percy said, blushing as he put his helmet on. The four boys made their way to the bridge. Stretching out below them was a lush green world.
"Men, bring it in." The democracy officer called to them as they circled around the monitor. "May I present to you the planet of Naboo. Based on our reconnaissance, this is their capital, Theed." The officer pointed to it on the screen. "Their military force is primarily composed of aquatic freaks called the Gungans and soldiers called the clone troopers."
"Why aren't we hitting the bugs?" Ron Weasley asked. "I've heard we're being routed from Cheopessa IV."
"You're operating on outdated information, soldier." The democracy officer said bluntly. "That planet has a thriving democracy now. But these clones, they've been programed and brainwashed on evil ideas. They don't know what we know about democracy. We've been called to teach them what's what. That's it, and watch out for their general, a General Skywalker. He's supposed to be some space wizard type so if you see him, take caution and don't go in alone. Lock and load!"
"Yeah!" The soldiers gave high fives and made their way to the capsules.
"See you on the other side." Grif said, stepping onto the footlocks which locked him in and he lowered into the capsule. Harry was about to make his way into the capsule but a hand was placed on his shoulder.
"I've missed this." Ron said.
Harry smiled under his helmet. "It's good to have you by my side again, Ron." They clasped hands for a moment before going to their capsules. Harry felt himself lower in before the capsule started rattling. It was go time now.