Spartan II Sierra-117 Master Chief with his new Ai partner Cortona 2.0 made from the orginal data of the Chief's old Ai partner are in for a new dangerous adventure as a new enemy known as the Theradons have taken over an alternate Earth being the Pokémon World. But a shocking discovery is revealed as an old foe from the distant past has risen from the dead in the form of the Prophet of Truth as the remains of the Orginal Covenant and combined with the remains of Storm Covenant to form the Neo Covenant with the Theradons as a part of it. But as Chief and his Blue Team backed up by Agent Locke and Fireteam Osiris along with other Spartan teams a feet of 29 ships from the Elites and UNSC the Forunners had also expanded into several different dimensional universes each one with different Earths, but made portals to the Ark as the Halo Rings also act as portals to other dimensions.

A new Human-Covenant war is about to ignite as the Elites and the Human Race face their most dangerous battle yet. A war that is fought in not just other planets, but also different dimensions. Will Chief and Cortona 2.0 alongside the Arbiter and their new allies stop a resurrected Prophet of Truth and his insane goal of activating the Halo Rings? And who is behind this mass resurrection?! A darker force greater than the Flood or worse?

(This story is an alternative outcome if Chief was able to bring the fragment of the Orginal Cortona to her senses and Doctor Halsey used the fragment's data to create a updated version of Cortona in Halo 5: Guardians. It's like Cortona getting a new body and form. It's based of The Weapon Ai's appearence in the future game Halo: Infinity.)

This is a multi-crossover featuring these series.
Halo.
Sonic the Hedgehog.
Pokémon (anime) with fan made Pokemon in it.
The Legend of Spyro.
MLPFiM (post Season 9) and a couple MLP G5 characters.

This story has a Dark tag added to it.