Curse / Stat Splitting

There are almost 1000 pokemon, and that number might be surpassed soon. There was bound to be something with the potential to threaten even Saitama, some tactic that can exploit or bypass Saitama's absurd physique.

To my surprise; I found a pokemon with two strategies that in theory would bring down Saitama: Cofagrigus.

As expected from his name; Saitama attacks using punches primarily (although slaps and kicks are also options). So if we assume that Saitama has a moveset consisting of Normal or Fighting moves (Mach Punch, Mega Punch, Dynamic Punch, Focus Punch, Close Combat…) then Saitama would have no offensive options to fight Cofagrigus.

So now that we have a scenario where Saitama's attacking power and speed are irrelevant, we need to still deliver the killing blow. This is difficult to do since kaiju and Boros (who is basically Cell from DBZ) have been completely unable to even scratch Saitama; he's arguably indestructible.

But Cofagrigus is a ghost, and ghost don't always fight fair. Three moves are potential game changers in this battle; Curse, and a Guard/Power Split.

First is Curse.

Very strait forward tactic: Cofagrigus puts a curse on Saitama, which decreases his HP by ¼ every turn, eventually killing him. Cofagrigus is immune to Saitama's attacks, and so can survive. Maybe Cofagrigus uses Mean Look first to prevent Saitama from escaping. Maybe use Will-O-Wisp just for kicks.

Second is Guard/Power Split.

In this tactic; Cofagrigus uses these Splits to weaken Saitama and strengthen himself to defeat Saitama in a conventional fight.

For those who don't know; these moves combine the totals of Defense or Attack and divides it by two: then make that same stat the new stat for both Pokemon. So if we assume Saitama has 99950 Attack and Cofagrigus has 50 Attack; then both of them will have 50000 Attack. Same goes with Guard Split and Defense. With both combatants having identical stats, but Cofagrigus being immune to Saitama's attacks, then Cofagrigus can negate Saitama's indestructibility and eventually defeat him conventionally. If we assume Saitama's stats are infinite, then it is arguably a better scenario since half of infinity is infinity; either way, the two get identical stats in Attack and Defense.

I will mention that Saitama was confirmed to have superhuman biting force, and Bite is a dark type move. However since Saitama doesn't know what a Ghost Pokemon is, and he's a bit of an idiot anyways, I don't think he would attempt to use this move against Cofagrigus.

The more likely scenario is that Saitama would use Rock Throw or Earthquake to deal damage: or that he might know Fire Punch simply because his punches produce so much heat by their sheer striking force alone, and he might know Bullet Punch if the name is a reference to speed. Sucker Punch is also a possibility, although that move is actually very uncommon for Fighting types, and will only work if Cofagrigus is using a conventional attack (which is not part of the Cofagrigus' strategy here until AFTER he uses the Splits).

However Cofagrigus can use Guard Split and Power Split to even each other's stats, giving him the potential to survive these blows. Saitama would need to use these relatively unorthodox methods immediately, which again, is unlikely since he's not a good tactician.

I will also mention that Confusion Ray and One-Hit KO moves also have the potential to defeat Saitama; but it has never been confirmed nor denied if Saitama can survive his own punches, and One-Hit KO can be dodged easily: the only exception is a pokemon like Articuno who uses Mind Reader to confirm the hit, but Articuno would be One-Punched before this could happen (hence why Mind Reader-Sheer Cold Combo is not used competitively; it's a predictable tactic by a pokemon with just okay defenses).

Another mention: Wobbuffet cannot use Counter or Destiny Bond to defeat Saitama; Counter requires Wobbuffet to survive the punch (good luck with that) and Destiny Bond is (best case scenario) a stalemate.

I'll say it again; there are a lot of assumptions here, and it's just a theory. These are just thought experiments. I don't care if you think I'm wrong, because I am well aware that it's possible that I am indeed wrong. I'm just doing this for fun and to open up a discussion.