What it does on the ladder
Vivillon appears on 3.1% of Regulation M-B teams, which
is 46th of the 282 Pokémon with enough games to measure.
The move it almost always carries is Sleep Powder, on 98.8% of sets.
The item is usually Focus Sash at 89.9%.
The ability is split: Compound Eyes on 97.3%, Friend Guard on 1.9% and Shield Dust on 0.7%.
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
Vivillon is number 666 in the National Dex, a Kalos Pokémon, Bug and Flying
with a base stat total of 411 — 227th of the 234 Pokémon
legal in this regulation. Its best stat is Sp. Atk at 90, 108th
in the format; its weakest is Sp. Def at 50, 227th.
It can have Shield Dust, Compound Eyes and Friend Guard.
The Champions module tiers it UU.
It sits in a 3-stage line: Scatterbug → Spewpa → Vivillon.
Not all of that line is legal in this regulation — Scatterbug and Spewpa are not.
What gets through
As Bug and Flying, 5 of the eighteen attacking types do extra damage to it, and Rock lands for quadruple. It
resists 3 and is immune to 1. The board above
has all of it. No other legal Pokémon has this typing.
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 Vivillon takes extra damage from.
- Incineroar — Flare Blitz (Fire, ×2), on 91.2% of its sets
- Garchomp — Rock Slide (Rock, ×4), on 75.9% of its sets
- Charizard-Mega-Y — Heat Wave (Fire, ×2), on 99.2% of its sets
- Farigiraf — Thunderbolt (Electric, ×2), on 59.2% of its sets
- Archaludon — Electro Shot (Electric, ×2), on 98.6% of its sets
- Pelipper — Hurricane (Flying, ×2), on 98.1% of its sets
Speed and weight
At level 50 with a boosting nature and full investment, Vivillon reaches
155 Speed; left uninvested with a neutral nature it sits at
109. Invested, it outruns 12 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 17 kg, so Grass Knot and Low Kick hit it for 40 base
power. That is a real consideration in a format where both are common.
Its move pool
Vivillon learns 70 moves in the Champions data.
34 of them do damage, across 8 of the eighteen
types, and 15 share a type with it and so get the same-type bonus.
Its hardest-hitting same-type move is Hurricane at 110 base power, though the biggest number in the pool is Giga Impact at 150.
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.
