Multiverse



The Multiverse is a collection of infinite timelines that, presumably, spreads across the entire My Little Pony franchise.

Overall continuity
A considerable amount of stories feature inter-dimensional travel as a plot device, and thus, play into the multiversal continuity. Notable examples of this was the My Little Pony: Nightmare Knights storyline, which featured different universe versions of countless characters from the Friendship is Magic mythos, and some from the Generation 1 series, such as, and the Reflections storyline, which built an alternate universe for the characters to explore and discover mirrored versions of themselves.

In-universe history
At some point, there was a "crisis" of infinite Equestrias.

The Pony of Shadows attempted to destroy the multiverse by tapping into the infinite power of Princess Celestia and Princess Luna but was thwarted by the Pillars of Equestria, though he never stopped trying. It was implied that he took down a number of worlds before his defeat, however.

Relation to other multiverses
The My Little Pony multiverse is, in some way, connected to the Transformers/Hasbro multiverse, as confirmed thanks to the existence of Primax 613.28 Lambda and Tyran. According to Vector Prime, however, My Little Pony is mostly fictional in his multiverse.

Alternate timelines

 * Alternative histories
 * Changelingverse
 * Discordverse
 * FlimFlamverse
 * Glimmerverse
 * Lunaverse
 * Sombraverse
 * Tirekverse

Earths
The Earths were a series of universes Discord traveled to. They were named Earth-1, Earth-2, Earth-3, Earth-52, Earth-616, Earth-Fawcett, and Earth-Z respectviely. Their name were parodies of the universes seen in DC and Marvel comics, with Earth-1 and Earth-2 being the primary realities in DC's "pre-Crisis" continuity, Earth-52 being a reference to DC's use of the number 52, Earth-Fawcett being a reference to, and Earth-616 being a reference to Marvel's main unverse.

Speculation
The sheer fact that the multiverse contains infinite timelines is an incredibly useful tool for both staff and fans alike. For the staff, it allows for an easy hand-wave for out-of-universe storylines or storylines that break canon, and for fans, it allows us to pretend something we didn't like just takes place in a timeline where everything is the exact same, only slightly worse.

It also may allow access for other cool events with other Hasbro products, assuming Hasbro ever allows MLP to ever crossover with any other series aside from brief cameos. A man can dream.