Should I be concerned about EVs, IVs and natures for US/UM’s storyline?

Question

Yo, in the main story should I worry about EVs and IVs and Natures? I mean. I'm not really competitive and junk. This is Pokemon Ultra Sun and Ultra Moon btw.

That's all and junk.

Comments

No, not really. The AI is pretty easy to defeat in >99% of the battles. With some basic knowledge of type effectiveness and higher in-game Pokemon levels, you can sweep through the game like a breeze. The only exception is, as usual, the Battle Tree, which requires more Battle Ready Pokemon to take on the more challenging battles. The first 20 battles aren't generally so hard, but the difference begins to show and soon the AI can easily overwhelm your untrained team.

So, if you're not looking to spend a lot of time in the Battle Tree, you need not waste time and effort in search for the perfect team. If you want, you can look for a right nature, and try EV training too, but IVs are really out of question. You always have Hyper Training for that.

Another point to consider is whether or not you want to participate in the Live events, like VGC and so on, then you'll definitely want a perfect team. However, this can be done post game and need not interfere with a casual run through of the game first

---

It depends on what you want when playing the storyline. If you want to use EV trained Pokemon for it, then by all means use them. If you want to play through the storyline quickly, or explore all the optional areas relatively quickly, then EV training will only slow you down.

Answer 1

No. You should be more concerned about movesets and type matchups.

Answer 2

I would say you should always be worried about evs no matter what, but ivs don't really matter much in the story line especially since you only get them in the end of the game, even when you grind if you don't have the proper evs you're going to lose very quickly, also natures can affect a Pokemon's stats a lot, so make sure you don't have anything that lowers your Pokemon's primary stat.

Comments

I've never found that I lost very quickly without EV training, as long as my Pokemons' levels were high enough. Also, Pokemon with bad natures still work in playthroughs, like how a modest Infernape can still one-shot a lot of things with close combat.

---

a lot of ppls I know screwed up on evs and lost tons of times to battles with high level Pokemon mainly stuff like totem araquanid, and Lurantis also I assumed u transferred powerful Pokemon from different games for USUM, and close combat is a very powerful move

---

No, the Infernape I was talking about was from Platinum and received as my starter, not transferred. Also, are you sure non-EV trained Pokemon lose to Totem Pokemon? Pokemon Showdown!'s damage calculator seems to think otherwise.
0 SpA (level 20) Araquanid-Totem Aurora Beam vs. 0 HP / 0 SpD (level 18) Hawlucha: 22-28 (36 - 45.9%) -- guaranteed 3HKO
0 Atk (level 18) Hawlucha Aerial Ace vs. 0 HP / 0 Def (level 20) Araquanid-Totem: 26-32 (41.2 - 50.7%) -- 0.4% chance to 2HKO

0 Atk (level 24) Lurantis-Totem Solar Blade vs. 0 HP / 0 Def (level 22) Hawlucha: 25-30 (34.2 - 41%) -- guaranteed 3HKO
0 Atk (level 22) Hawlucha Aerial Ace vs. 0 HP / 0 Def (level 24) Lurantis-Totem: 32-38 (42.6 - 50.6%) -- 0.4% chance to 2HKO