Does it really matter if my Manaphy is good in Sp. Attack but has Nature : Careful and decreases Sp. Attack?

Question

Please someone answer back in a few days I want to train it so badly lol I got those Power Lens on it right now.

Answer 1

Yes, unfortunately it matters. If you want to train it I suppose you want to use it in battle and in competitive battling natures play a key role. I suggest to find a creative set or trade it for a better one, maybe modest or timid.