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For it to be a global version, as in, you choose which region to start in and be limited to only the pocket monsters native to said region until you beat E4. Each region having a new story ofc, the new generation, shit like that etc.
With online battles for each region locked to the mons of its generation and prior and a global one where anything goes.
This would be a good design decision and as it is GF, they are allergic to this shit, so nothing akin to this would happen.