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>Game Freak originally planned a "hatching facility" for X/Y where you could give them eggs and hatch them all at once.
>Flying through the sky was originally planned for X/Y (it was later implemented in ORAS). That's why Sky Battles existed in the first place, and that's originally how we were supposed to find the Legendary Birds
Gen 9 and they still make us watch eggs hatch one at a time with no animation skips.
