pkmnlab

Mega Gengar

Ghost · Poison · 600 BST · Gengarite
Regulation M-B legal · 4.9% usage
Mega Gengar
Base stats before and after Mega Evolution.
Stat Base Mega Relative size Change
HP 60 60
Attack 65 65
Defense 60 80 +20
Sp. Atk 130 170 +40
Sp. Def 75 95 +20
Speed 110 130 +20
Total 500 600 +100
Ladder

Used by 4.9% of Regulation M-B teams, 30 of 282 Pokémon on the ladder.

Moves

Protect 99.4% · Shadow Ball 97.7% · Perish Song 81.7% · Sludge Bomb 62.3% · Disable 38.7% · Substitute 7.7%

Ability

Shadow Tag 100%

Spread

The most common is Timid with 16 HP, 252 Sp. Atk and 252 Speed, on 6.5% of them.

Partners

Incineroar · Politoed · Archaludon · Swampert-Mega · Vivillon · Ninetales-Alola

Taking damage

×4
nothing
both types weak
×2
DarkGhostGroundPsychic
super effective
×½
FairyGrass
resisted
×¼
BugPoison
doubly resisted
×0
FightingNormal
no effect

Dealing damage

×2
FairyGhostGrassPsychic
your STAB hits these
×½
nothing
these wall your STAB

What Mega Evolution changes

Gengar, number 94 in the National Dex and a Kanto Pokémon, holds Gengarite to become Mega Gengar, taking its total from 500 to 600. The biggest single gain is 40 Sp. Atk, followed by 20 Defense. Nothing goes down — HP and Attack stay exactly where they were.

The typing does not change — it is Ghost and Poison before and after — so the Mega is the same defensive problem as the base form, only bigger. Mega Evolving replaces Cursed Body with Shadow Tag.

What gets through

As Ghost and Poison, 4 of the eighteen attacking types get through for extra damage. It resists 4 and is outright immune to 2. The full board is above; the short version is that the types listed under ×2 and ×4 are the ones worth planning around.

On the Regulation M-B ladder

Mega Gengar is played on 4.9% of teams in the Regulation M-B VGC ladder, which puts it 30th of the 282 Pokémon with enough games to measure. The move almost every one of them carries is Protect at 99.4%. The Champions module tiers it Uber.

Those figures come from Smogon's published usage statistics rather than from anything measured here, and they describe what the ladder plays, not what is strongest.

What threatens it

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

Where it sits among the Megas

Of the 91 Mega forms in the dex, Mega Gengar is 49th by base stat total. Its best stat is Sp. Atk at 170, which is 7th among Megas; its worst is HP at 60, 82nd. No other Mega Evolution has the Ghost and Poison typing, so this matchup board is unique to it. The unevolved Gengar is itself on 0.15% of teams.

Putting it on a team

A Mega slot is a commitment: the stone occupies the held item, so whatever Mega Gengar would have wanted from an item, it does not get. Drop it into the team builder to see what the rest of the six then have to cover, or take it to the damage calculator to find out whether those 170 points of Special Attack actually change a knockout.