The Many Worlds Theory

The Many Worlds Interpretation
The many-worlds interpretation is an interpretation of quantum mechanics that asserts the objective reality of the universal wavefunction and denies the actuality of wavefunction collapse. Many-worlds implies that all possible alternate histories and futures are real, each representing an actual "world" (or "universe"). In layman's terms, the hypothesis states there is a very large—perhaps infinite[2]—number of universes, and everything that could possibly have happened in our past, but did not, has occurred in the past of some other universe or universes. The theory is also referred to as MWI, the relative state formulation, the Everett interpretation, the theory of the universal wavefunction, many-universes interpretation, or just many-worlds.

In Smugaming lore
In Smugaming lore, there are a number of universes that are known.

Prime Universe (Universe 1-33.7)
The prime universe (Known as Universe 1-33.7) is the main universe that the Smugaming timeline revolves around. All that happens in the prime universe is canon and the prime universe acts as a base for all other alternate universes.

The existence of other universes were discovered during the Smugville Civil War Arc. During the Hikmat revival sub-arc "Tito" and Matt needed to find a way to revive Hikmat, who was killed in his battle against the Great Cousin Corey in the End of 2016-vangelion arc. Eventually they uncovered a device known as the Duane Co. Time & Space Displacement Device. This device came from the Duaneverse (Universe 2-08.7) and accidentally ended up in the prime universe. They used this device to bring an alternate universe Hikmat to their universe. This Hikmat came from the Basically Prime Universe (Universe 1-33.8), a universe extremely similar to the prime universe. This Hikmat (technically Hikmat 2) has taken the place of Hikmat but died in early 2018. Hikmat 2 was replaced with Hikmat 4, who came from a dark future known as The Virgin Realm (Universe who actually cares no girl with ever notice me).

Basically Prime Universe (Universe 1-33.8)
This universe is a parallel universe so similar to the Prime Universe no one can actually tell the difference. This was the universe that Hikmat 2 came from.

Bowloverse (Universe 182-4.1)
The Bowloverse is an extremely unstable universe, home to many fictional characters who ended up there one way or another. The most important person in this universe is Bloodstain the Echidna, brother of Knuckles and Lord Destroya's arc enemy.

The Virgin Realm (Universe who actually cares no girl will ever notice me)
The Virgin Realm is a dark alternate future version of the prime universe where virgins ruled the world with sadness and chads were almost wiped out. The only surviving chad was Hikmat (now dubbed Hikmat 4), who was brought into the prime universe after Hikmat 2 was killed.