>>22528521how about this?
each coloured box can have its own version of history or a different dimension.
this way oras can exists along side R/S/E.
With that said even multiple version of the same dimension can exists like with our cartridges, my sapphire version is pretty much the same as yours but my choices, character, pokemon might be different, these variation of the same dimension are overcome through trading and such.
HOWEVER this must comply with the same universe as
>>22513914for that reason R/S is similar but with variations with ORAS, in terms of slight or major deviations of items, pokemon, people, places, world.
the only deviations to this are B2W2 through memory link and poke transporter.
Memory link allows to connect the previous history of BW, where normally history is fixed and unknown.
eg; hg/ss the person waiting on mt.silver may be red/green it is determined through your gender. Memory link removes this and adds the player's name, effort and endevors through memory link.
Poketransporter allows to connect to another universe to transport pokemon and change them, such as giving granbull a fairy typing.
TLDR;
different colored boxes=different variations of history/dimensions, with that it still must be in the same universe as
>>22513914. This way it makes sense for some things like all the types and pokemon availiable in ORAS but not RSE and so on.