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PSA: If you are short on potions, leave your mons fainted for the next couple of days.
When Gen 4 drops, if it follows the same trend as Gen 2 and 3 last year, all your mons will be auto revived and full HP.
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OP is absolutely correct. The slightest alteration in cp formula and Niantic mass revives everyone's entire Pokemon collection. They even did it when they mistakenly upped Ho-Oh's max CP to over 4000. It was only inflated like that for under 2 hours. I caught an inflated boosted one but I knew Ho-Oh still not worth resources (plus I had no resources).