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>ITT: We fill in the gaps GameFreak left in the world of Pokemon
I'll start.
>The invention of the extra dimensional apparatus used to make Poké Balls was greatly advanced by the discovery of several golden rings with bizarre dimension-warping properties in the Ruins of Alph. The first prototype Poké Balls were made using these very rings and apricorns, and are highly sought after collector's items. It wasn't until many years later that scientists hypothesized these rings may have originated from Hoopa in the distant past.