Literally every Electric type. I arranged them roughly from hardest to easiest to handle, though the order really depends on which teammate is out and what kind of boosts they have.
The following are faster than

and/or cannot be OHKOed by

outside sun/crits

:pinchurchin:

,

,

are a gray area;

has 62.5% chance to OHKO on

with Max Overgrowth, and the magnet duo are OHKO by Max Flare if they lack Sturdy)

are all slower than

and usually OHKOed even outside Dynamax (Draining Kiss is a 87.5% roll on

)
These Pokémon threaten heavy damage with their STAB moves because both

and

are weak to them, and

doesn’t do so hot against unresisted STAB attacks, especially on the special side. The paralysis chance from most of them is also terrible if Misty Terrain isn’t up.

is probably the biggest threat to the team. If it comes out as a lead, it usually takes a KO, and is only reliably dealt with by setting up before it comes out (luckily sun from Max Flare lets

take the OHKO).

is not great either because it outspeeds

, isn’t OHKOed by Max Starfall even with a speed boost, and sets Light Screen

does OK against

but doesn’t like the Light Screen and can’t handle getting crit while setting up Calm Minds.

can OHKO it at +2 Attack, but takes quite a bit of damage from its STAB Electric moves.
Strong attackers with Electric moves (that aren’t electric types)
Unless

or

is set up,

is in this team’s top 3 scariest matchups, as Wise Glasses-boosted Thunder hits hard and has a decent chance to paralyze. It also has really good special defense, meaning not even a crit Max Airstream from

will OHKO.

is pretty easy to OHKO, but its speed means something is probably taking damage, and

has a chance to get paralyzed or frozen.

doesn’t get OHKOed by

without a crit, is unpredictable, and gets scary if it has the Flare Boost ability. It seems to tend to go for Tailwind turn one against

, so Max Airstream might be the best move, but then you risk status from a Tricked Flame Orb or Thunderbolt if it doesn’t go for Tailwind.
If I faced a

on this run,

was already set up. Failing that,

has to dodge crits from Fire Punch.
Other threats
It didn’t cause me problems on the 113 streak, but man this thing is a menace. Max Airstream from

has an 87.5% chance to 2HKO, but that assume two things: 1) you have two turns of Dynamax left, and 2) your damage isn’t reduced by a Moonblast Special Attack drop or a Calm Mind boost. Despite its Steel typing,

matches poorly into

due to only carrying a dark move and having base 55 Special Defense.
Losing a run to this thing is what caused me to put Knock Off on

’s moveset and give it a lot of Special Defense EVs. This thing has crazy special bulk;

needs +3 or +2 and rain to OHKO, and it likes to waste PP with Spite, Endure, and potentially Grudge.

is specifically tailored to take on this Pokémon with some consistency, but the combination of Endure + Weak Armor makes

a less-than-safe bet against

.
Not a fun Pokémon to deal with when your primary attackers are special attackers.

is also weak to Flamethrower and cannot OHKO without a Swords Dance boost.

is usually part of the puzzle of defeating this thing unless

is already out and set up. If

isn’t the one defeating

, then

appreciates it as a pivot point so it does not have swap into Flamethrower (outside of a Magic Powder or Forest’s Curse from Metronome) or deal with status.
The possible Special Attack drop from this thing’s Moonblast is probably its scariest feature. Switching out also isn’t great, as

doesn’t take Moonblasts very well and would have to spend at least 3 Knock Off PP and probably 5 or 6 Rest PP for a chance to dispatch it with reasonable safety (one Knock Off to get rid of Pixie Plate, two to KO after Swords Dances). One poorly timed crit, though, and

is toast. I always just stay in with

, and I managed to dodge Special Attack drops this run.

/
The main threat here is Light Screen, as

has no trouble dispatching these two.

can't set up easily against

due to Shadow Ball being pretty strong.

has U-Turn, meaning it can switch to something

can't handle while halving the damage on

and

.
The combo of status from Poison Fang and stat boosts from Acupressure is scary.

is slower and only has a 68.8% chance to OHKO with Max Airstream.

to

is probably the most efficient line, though I’ve used

to solo it as well, at the cost of many Knock Off PP.
Really only a problem if

is out and is low on health or out of Dynamax turns. Psychic Terrain-boosted Psychic + the possibility of Analytic shreds my team if I give it an opening.

is slower and baits Flamethrower here, which is a pretty strong move and has a chance to burn. It also sets up a theoretical for

to come in on an unexpected Flamethrower, but that never happened.
Unless

is set up or

crits with Max Airstream, this thing is liable to drain some health and PP off my team. It heals so much, and my team lacks the initial firepower to take it out in one hit.
Technician Bullet Punch has a slim chance to OHKO full health, non-Dynamax

, but

has an easy OHKO with Max Flare. I maybe ran into one of these on my run and it just took a little health off of

.

works as a check in a pinch, but Swords Dance makes crits scary.
Mostly a problem if it has Sap Sipper and is up against

, as it can set up Belly Drum or paralyze with Body Slam.

is a decent check if the Belly Drum goes up so long as it doesn’t have Huge Power.
I don’t 100% remember if I faced one of these on my 113 run, and if I did, I believe sun was up. Without sun,

’s Max Flare has a 62.5% chance to OHKO, making this is the only Steel type that

doesn’t have a guaranteed KO against with Max Flare besides Sturdy

/

. I’d probably take the risk with

in some situations, but I think

would do OK against it.
Crit Meteor Beam does upwards of 95% to

. If

has Weak Armor,

OHKOs 93.8% of the time, but both Sand Stream and Sturdy block the OHKO.

doesn’t stack up well due to

consuming its item with Meteor Beam and having high physical bulk.

can do pretty well, especially if Dynamax is available.
Bulky, hits pretty hard, and threatens status with Body Slam.

doesn’t OHKO without a crit Max Airstream, and even that isn’t a guarantee.

easily walls it, but doesn’t do much in return due to Defense Curl.

can 2HKO with +1 Moonblast, but can end up taking quite a bit of damage in the process if it tries to set up.
I don’t think I encountered one of these on my 113 steak run, but I did in subsequent attempts.

can’t 2HKO with Max Airstream unless it crits, and it resists all of

’s moves.

does pretty well here, but Waterfall crits after a few Swords Dances would be bad news, and flinches can cause issues.

needs +6 to OHKO with Knock Off. That being said, this thing has never actually ended a run for me.