What it does on the ladder
Aggron appears on 0.01% of Regulation M-B teams, which
is 270th of the 282 Pokémon with enough games to measure.
The move it almost always carries is Heavy Slam, on 97.1% of sets.
The item is usually Expert Belt at 71.1%.
The ability is split: Sturdy on 74.2%, Heavy Metal on 24.4% and Rock Head on 1.4%.
Those are Smogon's published usage figures, not anything measured here, and they describe what
the ladder plays rather than what is strongest. The full set is in the panel above.
The Pokémon itself
Aggron is number 306 in the National Dex, a Hoenn Pokémon, Steel and Rock
with a base stat total of 530 — 48th of the 234 Pokémon
legal in this regulation. Its best stat is Defense at 180, 4th
in the format; its weakest is Speed at 50, 196th.
It can have Sturdy, Rock Head and Heavy Metal.
The Champions module tiers it UU.
It sits in a 3-stage line: Aron → Lairon → Aggron.
Not all of that line is legal in this regulation — Aron and Lairon are not.
What gets through
As Steel and Rock, 3 of the eighteen attacking types do extra damage to it, and Fighting and Ground land for quadruple. It
resists 8 and is immune to 1. The board above
has all of it. One other legal Pokémon shares the same typing and the same board: Bastiodon.
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 Aggron takes extra damage from.
- Garchomp — Earthquake (Ground, ×4), on 85.7% of its sets
- Basculegion — Aqua Jet (Water, ×2), on 96.6% of its sets
- Sneasler — Close Combat (Fighting, ×4), on 99.7% of its sets
- Staraptor-Mega — Close Combat (Fighting, ×4), on 100% of its sets
- Blastoise-Mega — Water Spout (Water, ×2), on 96.4% of its sets
- Swampert-Mega — Wave Crash (Water, ×2), on 97.6% of its sets
Speed and weight
At level 50 with a boosting nature and full investment, Aggron reaches
112 Speed; left uninvested with a neutral nature it sits at
70. Invested, it outruns 0 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 360 kg, so Grass Knot and Low Kick hit it for 120 base
power. That is a real consideration in a format where both are common.
Its move pool
Aggron learns 124 moves in the Champions data.
81 of them do damage, across 15 of the eighteen
types, and 16 share a type with it and so get the same-type bonus.
Its hardest-hitting same-type move is Head Smash at 150 base power.
It has no priority move, so it moves in Speed order every turn.
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.
