Mega Gengar weaknesses and resistances
Every one of the 18 attacking types against this boss's typing. GO multipliers: 1.6x super effective, 2.56x doubly, 0.625x resisted, 0.39x doubly resisted.
Mega Gengar is weak to ground1.6xghost1.6xpsychic1.6xdark1.6x
- Weak (4)
- Neutral (8)
- Resists (5)
- Double resists (1)
It resists fighting0.24xnormal0.39xpoison0.39xbug0.39xgrass0.625xfairy0.625x— bringing one of those is throwing damage away.
Best Mega Gengar counters
Mega Gengar needs about 5 trainers with Pokemon of this strength. Bring everybody. Difficulty rating 4.00 with the best counter, 18:37 to win.
| # | Attacker | Moveset | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 |  Garchompdragongroundjoint top pick | groundMud ShotgroundEarth Power | 3,962 | 18:37 | 4.00 | 6.0 | 27.2% | |
| 2 |  Hisuian Zoroarknormalghostjoint top pick | ghostShadow ClawghostShadow Ball | 2,615 | 18:14 | 3.92 | 6.0 | 27.8% | |
| 3 |  Metagrosssteelpsychicjoint top pick | psychicZen HeadbuttpsychicPsychic | 3,791 | 18:40 | 4.01 | 6.0 | 27.2% | |
| 4 |  Salamencedragonflyingjoint top pick | darkBitedarkBrutal Swing | 3,749 | 18:40 | 4.02 | 6.0 | 27.2% | |
| 5 |  Hydreigondarkdragon | darkBitedarkBrutal Swing | 3,625 | 18:35 | 4.00 | 6.0 | 27.3% | |
| 6 |  Tyranitarrockdark | darkBitedarkBrutal Swing | 3,834 | 18:50 | 4.05 | 6.0 | 26.9% | |
| 7 |  Gengarghostpoison | ghostLickghostShadow Ball | 2,878 | 19:10 | 4.12 | 6.0 | 26.5% | |
| 8 |  Alolan Mukpoisondark | darkSnarldarkBrutal Swing | 2,757 | 20:23 | 4.38 | 6.0 | 24.9% | |
| 9 |  Rhyperiorgroundrock | groundMud-SlapgroundEarthquake | 3,733 | 20:39 | 4.44 | 6.0 | 24.6% | |
| 10 |  Excadrillgroundsteel | groundMud-SlapgroundScorching Sands | 3,244 | 20:40 | 4.45 | 6.0 | 24.5% | |
| 11 |  Kingambitdarksteel | darkSnarldarkFoul Play | 3,614 | 20:46 | 4.47 | 6.0 | 24.4% | |
| 12 |  Alakazampsychic | psychicPsycho CutpsychicPsychic | 3,057 | 20:27 | 4.40 | 6.0 | 24.8% |
Ordered by Overall, pokebattler.com's own default — a blend of how fast the fight ends and how many of your six go down. Click any numeric column heading to re-order on that column alone.
Times are one trainer with six copies of that attacker, level 40 at 15/15/15, no weather, no friendship, no dodging, Shadow / Mega / Legendary attackers hidden — the same defaults pokebattler.com's own counter pages open with. Open the full counter tool to change any of them. "Details" opens the per-move damage, breakpoints and energy cycle against Mega Gengar.
Estimator is how many trainers of this strength the fight needs. Power is the share of Mega Gengar's HP that six of that attacker remove inside one raid timer, so over 100% means they finish it with time to spare. Faints is how many of the six go down inside that timer.
Hardest movesets to raid against
The boss rolls one of these 12 pairings, and it changes the fight. Each row re-runs the top 6 counters against that single moveset.
| # | Boss moveset | Time to win | Estimator | Faints | Win % |
|---|---|---|---|---|---|
| 1 | darkSucker Punch+fightingFocus Blasthardest | 20:58 | 4.51 | 6.0 | 100% |
| 2 | ghostShadow Claw+fightingFocus Blast | 20:46 | 4.47 | 6.0 | 93% |
| 3 | ghostHex+fightingFocus Blast | 20:40 | 4.45 | 6.0 | 92% |
| 4 | ghostShadow Claw+ghostShadow Ball | 18:38 | 4.01 | 6.0 | 100% |
| 5 | darkSucker Punch+ghostShadow Ball | 18:35 | 4.00 | 6.0 | 99% |
| 6 | ghostHex+ghostShadow Ball | 18:12 | 3.92 | 6.0 | 99% |
| 7 | darkSucker Punch+poisonSludge Bomb | 17:41 | 3.80 | 6.0 | 100% |
| 8 | ghostShadow Claw+poisonSludge Bomb | 17:38 | 3.79 | 6.0 | 100% |
| 9 | ghostHex+poisonSludge Bomb | 17:35 | 3.78 | 6.0 | 100% |
| 10 | ghostShadow Claw+fightingDrain Punch | 17:17 | 3.72 | 6.0 | 100% |
| 11 | darkSucker Punch+fightingDrain Punch | 17:17 | 3.72 | 6.0 | 100% |
| 12 | ghostHex+fightingDrain Punch | 17:13 | 3.70 | 6.0 | 100% |
A raid boss rolls only its standard movepool — never a legacy or Elite TM move, verified against Pokebattler's own per-moveset list for six reference bosses. The ranked table above averages over all of these, which is what Pokebattler's DEFENSE_RANDOM_MC means.
What Mega Gengar throws at you
Its standard movepool, with the damage window a dodge has to beat.
Fast moves
| Move | Power | Energy | Duration | Hits at |
|---|---|---|---|---|
| ghostShadow ClawSTAB | 6 | +4 | 0.5s | 0.05s |
| darkSucker Punch | 5 | +6 | 0.5s | 0.10s |
| ghostHexSTAB | 8 | +13 | 1.0s | 0.80s |
Charged moves
| Move | Power | Energy | Duration | Hits at |
|---|---|---|---|---|
| poisonSludge BombSTAB | 85 | -50 | 2.5s | 1.30s |
| ghostShadow BallSTAB | 100 | -50 | 3.0s | 2.40s |
| fightingFocus Blast | 140 | -100 | 3.5s | 3.00s |
| fightingDrain Punch | 50 | -33 | 2.5s | 1.10s |
Catch CP
What the encounter after the fight can hand you.
| IV spread | CP at L20 | CP at L25 (weather boosted) |
|---|---|---|
| 10/10/10floor | 1,566 | 1,958 |
| 11/11/11 | 1,582 | 1,977 |
| 12/12/12 | 1,597 | 1,997 |
| 13/13/13 | 1,613 | 2,016 |
| 14/14/14 | 1,628 | 2,036 |
| 15/15/15hundo | 1,644 | 2,055 |
Caught CP range 1,566 - 1,644, or 1,958 - 2,055 when the weather boosts it.
A raid encounter is level 20 (level 25 weather boosted) and cannot roll an IV below 10/10/10. Anything outside the first range is not this raid's reward.
When it is in raids
Read from the committed LeekDuck rotation snapshot, fetched 2026-10-05.
Mega Gengar is not in the current rotation snapshot. The simulation below is still exact for the tier chosen above — Pokebattler simulates any defender you name, current boss or not.
Boss stats
How the numbers in the header are built.
| Header number | Worked out | Value | Inputs from |
|---|---|---|---|
| Attack | floor((349 + 15) x 0.79) | 287 | Game Master base Attack, tier CPM |
| Defense | floor((199 + 15) x 0.79) | 169 | Game Master base Defense, tier CPM |
| HP | 22,500 — fixed by tier, base Stamina 155 unused | 22,500 | tier HP pool |
| Lobby CP | floor((349 + 15) x sqrt(199 + 15) x sqrt(22,500) / 10) — no CPM term | 79,872 | Game Master base stats, tier HP pool |
A raid boss uses 15/15/15 IVs, its tier's CP multiplier and its tier's fixed HP pool — stamina does nothing, which is why the same species is a different fight at every tier. Every tier constant above (CPM 0.79, 22,500 HP, 300s timer) is copied from Pokebattler's own published /raids tier table into src/engine/constants.ts, with the source named there.
Mega Gengar's own Pokemon page has its full movepool, evolution family, stat ranks and what it is good against as an attacker.