Comments

@Agent New Mexico, they actually do always matter mathematically. Even if it's a critical hit on something with 1 health, it means they are very less likely to get another crit hit in the battle and they're odds of crit hit have been lowered compared to the opponent. so it's actually a bad thing to get a crit on a low health Pokémon.

@Alickzzz, That is only true if you are speaking in a theoretical scenario... Crits are not calculated based off how long since the previous hit, or else people would be able to effectively raise crit chance through counting turns and keeping track. Each crit calculation is a Random number generator. From a more simplistic point of view if you generate a random number one to 10, and then afterwards you generate a second number from 110, the fact you rolled a specific number last time doesn't affect your next role, even though it is unlikely to get the same number twice... Bring that to a larger scale and it really doesn't affect anything getting a crit

@LoZ Fanatic, but doesn't the fact that it's unlikely to get the same number twice prove what I mean? Like when you toss a coin and get heads it's more likely to get tails on the next flip, and more and more likely with every consecutive heads. It's 1/16 chance for crit hit, if you get the crit when it's useless then you're chances of another crit in the next 15 turns is 0, theoretically yes, but this changes your crit ratio to 1/32 for the next 15 turns while your opponent ratio would still be 1/16

@Alickzzz, Common misconception. Sure you're not very likely to get a string of all heads, but you're actually equally unlikely to get a string of specifically HTTHTHT as HHHHHHH. Think about it. The coin flips are completely independent of each other  so the difference is not in the probability of getting heads, but in the probability of fulfilling the sequence exactly. And each Pokemon move is independent in the same way. Sure it's unlikely that you'll get two in a row, but the first one does not affect the second one at all, by definition.

@Enderdragon6683, uggh I'm at 87% complete in my alola dex. I got all the hard to get item and weather Pokemon. like garchomp and scizor. Now all I need to do is the ultra beasts and type null and a few random staglers. I have all the SOS only encounters done. I'm or getting my type null myself but using a friends so I can get the shiny charm before I claim my null. My gosh it has been a hard run but at this point I'm less than 2 days out from finishing it. And no I can't trade you the item pokemons (slowing sizor and porygon z) since I used them on the gte to get other ones to save time.

If number generators follow the same probability laws of everything else that is, which I'm sure they do? It's random just like a coin flip or dice roll. I mean it barely effects the game cause crit hits are that unlikely, but it still has that negative effect on your damage output even if it's a little.
Pokemon: Okay I've got quite a bit of health left and they're only one hit away. Pokemon to Pokemon: Best miss the 95% accuracy move twice. Pokemon: Great now we BOTH have low health. Pokemon to Pokemon: Land a crit. Pokemon: But it won't matter at this poi... Pokemon to Pokemon: CRITS ALWAYS MATTER!!!!!