All of these stories take place between episodes of Young Justice: Invasion. The time will simply be stated as Before: (Episode Name). They will start with between episode 1 and episode 2, then 2 and 3, ect. Enjoy!
Quick Reminder Earthlings is the episode where Beast Boy, Miss Martian, and Superboy are on Rann after Happy New Year where the Krolotean invasion has been revealed.
Before Earthlings
AMBASSADOR'S OFFICE, REACH HOMEWORLD
Reach Ambassador POV
"[Human nonsense] Krolo," the Main Man said as he tore a robotic duplicate of the human leader in two.
"Freeze footage," I tell the computer. "Can we confirm these events Warrior?" I tell the Warrior assigned to me.
"GURRRRRR," the Warrior grumbles at me. "Our agent on Mars sent the footage to us. The Main Man did attack the human leader."
"I don't care about the Main Man Warrior. He is a small fry, who can be bribed into submission. Those pests meanwhile..." I ponder what they could be planning with the human race. "The meta-gene potential the Martian Warrior has told us about is the property of the Reach alone!"
"The Kroloteans have been focused on the Rannian sector." We have known for nearly a year that the Kroloteans have become the primary enemy for the Rannian Science Counsel. "Our intelligence estimates 90% of their forces are in that sector of the galaxy. The remaining 10% are spread out across Lantern space."
"So any Krolotean forces on Earth can be considered mere scouts," I ask the Warrior.
"Most probably," the Warrior says. "The meta-gene will be ours for the taking. The Kroloteans lack the number to threaten us."
"Unless of course they found a way to get their forces between Rann and Earth," a voice said. I thought it was only the Warrior and I in the room.
"Excellent theory, but whoever you are I don't wished to be disturbed until the warrior and I complete our meeting," I tell whoever rudely barged in here.
"I'm not here to tell you theories, I'm here to give facts." The voice emerges from the shadows and reveals himself to be an non-reach humanoid. "And who better to give advice about Earth than an earthling." The Warrior stiffs up as he prepares for battle.
"Klarion [unknown alien language]," the humanoid says. The Warrior charges at him to restrain the earthling, however a portal opens up. The Warrior charges into the portal and it closes once he is through. "Now that we are alone, I have an offer that I wish to present to you." He says now in fluent reach.
"Guards!" I yell as I press a device. Three doors open on all sides of my office. Two guards emerge from one door and one guard emerges from each of the other two doors. The two guards hold up their weapons... then immediately collapse. The two guards on the floor both showed swords coming out of their back. The other two lean against the wall but drop their weapons in weakness. After witnessing my guards in such poor shape I stared at the intruder, "There were 20 guards outside did you kill them all."
"If my universal translator worked properly, then medical scans of your species let me hold back so I could did not kill your guards." The earthling then walked up to my desk and picked up one of the artifacts I keep on it, a Lantern Power Ring won during our war with the Green Lantern Corp, damaged but it made a nice trophy. "After all I'm looking to have a better relationship with your people than what you have with the Green Lantern Corp."
"The earthlings are?"
"Of course," he said with an egotistical smile. "Specifically the meta-human population." Well at least the earthling knows what I'm interested in.
"Why should I listen to you?" I ask. "The reach could easily take your world without any help."
"Take it from who? The earthlings?" He fondled the ring a little. "The Green Lantern Corp?" He put the ring back down on my desk. "Or the Kroloteans?"
"The Lantern Corp would not risk war with us over your puny world. I'm sure you heard the Warrior and myself have a conversation about how the Krolotean threat to our interests on your world are minimal." The earthling then tosses me a portable computer.
"I had it translated for you." I begin to look over the computer files. After a while I start to speak again. "These are..."
"The locations of every single Krolotean base on Earth and Rannian sector. Alongside the technology they are using to transport between the two."
"How did you get your hands on this?"
"It's simple, I helped them set up all these bases."
"Why would you tell me about them?"
"My organization, The Light, and I wish to find... more reliable allies."
"The Kroloteans are not reliable?" I say sarcastically.
"Apparently."
"Hmmmm," I ponder the earthlings offer. "Stay with me, but bring back the Warrior so we can discuss this." The earthling smiles.
"[human language] Klarion [human language]"
All of a sudden my warrior, another earthling, and an animal appear through a portal. My Warrior attempts to attack all three of the earthlings but I intervene. "Warrior stop!"
"The intruders!" he complained
"Will wait outside!" I respond forcefully. The Warrior stands down.
"That's it!" the other earthling complained. "I wanted a chance to really go crazy." The mystical earthling changed his face to give a stronger smile.
"You will get your chance Klarion," the original earthling tells his friend. "But for now we wait."
Once the two humans left the room I sat down at my desk.
"Are you just going to let them get away?!" the warrior asks in anger.
"Maybe," I respond monotonically.
"MAYBE!" he slams the desk. "What could such meat possibly offer us-" I flip the monitor to show him the evidence that earthling provided for us.
"Apparently quite a lot."
"So some rats are on the planet," he dismisses. "It's not as though we cannot send an exterminator."
"Of course we could deal with the Kroloteans. The problem is that somebody more problematic than the Kroloteans could come along: Sinestro, Mongul, or even-"
"I get it we have to accelerate our time table."
"And to accelerate our timetable we should collect allies."
"[GRUNT]"
"Now put on your best face, I'm about to let them back in."
"The Reach does not need partners!"
"I'm well aware of the Imperial Guard's views, but as the head of the Foreign ministry, and an appointee of the high council, I must disagree."