What combination of moves, abilities, and type would have theoretically the best super-effective coverage?

Question

the moves include all moves from the Pokemon database, combination should be able to hit most Pokemon for supereffective damage. and if such a Pokemon exists, what would be the best counter to this Pokemon?

Comments

I changed the title to focus on type coverage as opposed to the "strongest Pokemon" (which could mean anything so isn't appropriate for this platform).
These questions are similar to this one and will likely lead to an answer:
* https://pokemondb.net/pokebase/114073/which-four-types-provide-the-most-coverage
* https://pokemondb.net/pokebase/234911/what-least-amount-types-that-cover-types-super-effectively

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https://pokemondb.net/pokebase/114073/?show=395012#a395012
This answer in particular takes all of moves, abilities, and type into consideration while figuring out the best super-effective coverage out of 4 moves. Would this count as a dupe?

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They are different questions, so no.

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Do you want to ignore the target Pokemon's abilities?

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i guess we should consider the targets abilities too

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This was asked a couple months ago by Loki Ron

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Can the user have flying press, freeze-dry, thousand arrows, mold breaker, or scrappy?

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Soak + an Electric move + Neutralizing Gas hits every Pokemon super effectively. Unless someone can figure out a niche situation where this doesn't apply, I think this is the answer.

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niche situations:

Neutralizing Gas cannot suppress another Pokémon's Neutralizing Gas, Multitype, Zen Mode, Stance Change, Power Construct, Schooling, RKS System, Shields Down, Battle Bond, Comatose, Disguise, Gulp Missile, Ice Face, As One, or Tera Shift.

I'm not sure if any of those aren't affected by Soak but they're not affected by NG

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Soak fails on Pokémon with Multitype and RKS System and, as @MonkeyBusiness said, cannot be suppressed by Neutralizing Gas. Soak also fails on Terastalized Pokémon, which might be worth mentioning.
As Soak and Neutralizing Gas doesn't work on neither Arceus nor Silvally, you'd still need coverage against all single-type Pokémon.

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Any Pokemon can Tera, which makes it more similar to a status condition than an alternate species or form. Saying we need to cover all Tera Pokemon is like saying we need to cover all Pokemon that use protect or have wonder guard entrained onto them. If the asker isn't responding to these comments anymore, I say we just worry about every form of every Pokemon and the abilities they can naturally have.

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If we dont look at 100% odds, its possible to hit all pokemon supereffectively with: neutralizing gas
metronome (hope for a super effective move), thief (to steal items like berries that may nullify damage) soak, and some other move for niche situations.