Don't throw it, but only if you have a plenty of Pokémon storage.
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Yes, I keep up the 31 larvitars and 4 pupitars I caught since the 2nd generation was launched to transfer the ones that I won't evolve when there is a double candy event
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You could wait until a double candy event, but it could be until Halloween (maybe the anniversary?). I'm holding on to 30 dratinis but getting impatient.
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looks like I will have to start swapping out the 120 pidgey, weedle, cats, rats and other 25 candy evolves that I am sitting on for double candy event to keep Larvitar and other 84%+ top level mons that I don't really need
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I finally got smart and started to save them for double candy. Up to 14 dratini, 24 larvitar, and 17 chansey.