Arbok

Base stats, and where each one ranks among the 234 Pokémon legal in Regulation M-B.
Stat	Base	Rank
HP	60	212th
Attack	95	108th
Defense	69	179th
Sp. Atk	65	165th
Sp. Def	79	130th
Speed	80	112th
Total	448	214th

Legal, but nobody plays it

Arbok is legal in Regulation M-B and did not appear often enough on the ladder to produce usage statistics. It is legal and simply out of favour, which makes it unmeasured rather than unusable.

The Pokémon itself

Arbok is number 24 in the National Dex, a Kanto Pokémon, Poison with a base stat total of 448 — 214th of the 234 Pokémon legal in this regulation. Its best stat is Attack at 95, 108th in the format; its weakest is HP at 60, 212th. It can have Intimidate, Shed Skin and Unnerve. The Champions module tiers it UU.

It sits in a 2-stage line: Ekans → Arbok. Not all of that line is legal in this regulation — Ekans is not.

What gets through

As Poison, 2 of the eighteen attacking types do extra damage to it. It resists 5. The board above has all of it. One other legal Pokémon shares the same typing and the same board: Garbodor.

What threatens it

Smogon publishes no head-to-head checks-and-counters data for doubles formats, so this list is computed, not measured: the most-played Regulation M-B Pokémon carrying a damaging move of a type Arbok takes extra damage from.

Garchomp — Earthquake (Ground, ×2), on 85.7% of its sets
Farigiraf — Psychic (Psychic, ×2), on 54.4% of its sets
Delphox-Mega — Psychic (Psychic, ×2), on 50.5% of its sets
Swampert-Mega — Earthquake (Ground, ×2), on 73.4% of its sets
Venusaur — Earth Power (Ground, ×2), on 77% of its sets
Metagross-Mega — Psychic Fangs (Psychic, ×2), on 90.3% of its sets

Speed and weight

At level 50 with a boosting nature and full investment, Arbok reaches 145 Speed; left uninvested with a neutral nature it sits at 100. Invested, it outruns 10 of the 20 most-used Pokémon in the regulation when they are invested too — which is the comparison that decides who moves first.

It weighs 65 kg, so Grass Knot and Low Kick hit it for 80 base power. That is a real consideration in a format where both are common.

Its move pool

Arbok learns 103 moves in the Champions data. 65 of them do damage, across 14 of the eighteen types, and 11 share a type with it and so get the same-type bonus. Its hardest-hitting same-type move is Belch at 120 base power, though the biggest number in the pool is Giga Impact at 150. It also has priority: Sucker Punch at +1.

That pool is what the team builder reads from when you seat it, and the damage calculator will take it as the attacker with the form already chosen.

Taking damage