This crossover was inspired by playing pokémon X after watching the movie "Halo 4: Forward Unto Dawn"

Helljumper, Helljumper, where you been?

Feet first into Hell and back again!

When I die please bury me deep!

Place an MA5 down by my feet!

Don't cry for me, don't shed no tear!

Just pack my box with PT gear!

Cuz one early morning 'bout zero-five!

The ground will rumble, there'll be lighting in the sky!

Don't you worry, don't come undone

It's just my ghost on a PT run!

U.N.S.C Marine cadence.

Pokémon: Training into Hell

Chapter 1: Hero's departure, SPARTAN's return.

Flashback:

The Unova League had just ended and Ash Ketchum stood staring at the Flames of Moltres with a letter in his hand. Though his planet was "technically" a seperate territory, the U.N.S.C. (United Nations Space Corps) held protection of their planet-and had allowed the inhabitants to call it "Earth".

Techincally, the planet was called New Solaris 3.

The inhabitants-which had adapted to survive alongside Pokémon-dealt with surface problems and the U.N.S.C dealt with high-threat extra-terrestrial threats. It was a relatively simple task ever since they gained an alliance with the Covenant-now led by the Sangheili (aka "Elites")...until a splinter faction broke off and once again started waging war upon humanity.

Ash was 15 (each journey took a year) and when times were desperate...

The letter dropped from his hands and one thing ws revealed, making Pikachu lower his ears in sorrow and fear.

Ash's planetary defensive actions as "the Chosen One" had been noticed...The U.N.S.C had drafted him.

Flashback end!

Three years since Ash disappeared after being drafted (leaving every Pokémon-including Pikachu-behind), the world fell into turmoil.

Team Rocket took control of the Unova Region, as well as parts of Kanto, Johto, Hoenn, and Sinnoh. To their shock, the Legendary Pokémon vanished from the planet (except for a few under the ownerhip of Trainers).

A NurseJoy and her Latias led the Kanto defence, while Tobias and his Darkrai kep Team Rocket at bay in Sinnoh. In Kalos, Team Rocket was fighting the newly formed Team Flare-preventing both teams from accomplishing anything in that region.

Pallet Town was holding strong, under Professor Oak, but they were weakening after every attack. Many of Ash's Pokémon had evolved (or in Gliscor, Pidgeot, Butterfree, Larvatar, Charizard, and Lapras' s case:returned), but the strain was getting to them. They wouldn't last much

As the next Team Rocket Attack Forces tried to attack from both the bay to the south and Route 1 to the north, something strange happened. A gigantic brown flying vehicle emerged above the planet wih a sound similar to a thunder clap. From it, a steel coffin-shaped object dropped from it. Hundreds of feet above the ground, a cable emerged from the top and four flat fins emerged in a "x" shape, catching the air and slowing down the object. Suddenly, the cable detached,and it quickly fell into the ground.

The front went flying off, revealing a figure in a black undersuit covered with grey armor with blue markings. His head was covered by a helmet with a green and black glass screen (Verdant visor color). Attached to the figure's back was something a few wigh miitary experience recognised as an advanced Designated Marksman Rifle. On his right leg was a gun that had a similar shape, but had a large drum-like object right before the trigger. This was the U.N.S.C.'s SAW-Squad Automatic Weapon...designed to supress squads of enemies.

Professor Oak and the rest of Pallet Town tensed, not knowing if the figure was a Team Rocket weapon.

"Why is it Hell always breaks loose when I take a break?" A rough, yet familiar voice spoke from within the MJOLNIR MARK 7 ENFORCER ARMOR, before grabbing the SAW.

Within Oak's pocket, Ash's PokéDex started up. "Scanning...data anylized. Person within unknown armor is Trainer Ash Ketchum."

"Impressive equipment, Professor", Ash said, "Very few devices recognize me as someone other than SPARTAN L401".

As the Slaughter of the Rocket Squad commenced, the Legendary Pokémon awoken from their slumber within Arceus' dimension. Not all of them were present; Lugia and the Legendary birds of the Orange Islands, Ho-Oh, the Latias defending Altomre (a town that became a Team Rocket fortress), and Suicune had been captured by Team Rocket and were locked within research bases-as Rocket scientists worked on repicating their power.

"The Chosen One has returned" Arceus stated, opening its eyes.

(*Enforcer armor in link on profile*)