Multi-Universe and Multiverse (SSJJ)

The Multi-Universe and Multiverse is a recent theme in canon with the introduction of the Multi-Universes in Dragon Ball Super. (Called Multiverse in Canon)

However, the concept of in the canon sounds more like a Multi-Universe theory than the Multiverse theory. As result this article's creator switches it up in Dragon Ball Advanced by retconning the Multiverse as a Multi-Universe and thus introduces a Multiverse similar to the DC and Marvel's style with the main universe being in Earth-1984.

Multi-Universe
As mentioned by Whis; each Universe has a twin and the 12 Universes in canon make up the number 13 while the 6 erased multiverses make up the number 31. The Universes consist of;


 * 1) Universe 1 & Universe 12
 * 2) Universe 2 & Universe 11
 * 3) Universe 3 & Universe 10
 * 4) Universe 4 & Universe 9
 * 5) Universe 5 & Universe 8
 * 6) Universe 6 & Universe 7
 * 7) Universe 13 & Universe 18
 * 8) Universe 14 & Universe 17
 * 9) universe 15 & Universe 16

Each of the Universes are either similar or complete different from one another as such as Universe 2 consists of fighters using poses to transform while Universe 11's Pride Troopers used poses recreationally.

Multiverse
As mentioned by Chronoa; the majority of the multiverse is circumstantial as simply task may or may not create multiverse as she described as a matter of which side a coin lands on and how decision affects the world. Such as Xeno Bardock acquiring Super Saiyan when his team died while Bardock simply killed Dodoria's team and tried to take on Frieza but nearly died in the process. Earth-1985 is the home universe of Xeno Kakarot while Earth-1984 is the main universe of the series.