Ghost and Dark types are powerful offensive types with unique immunities!

GHOST TYPE
Immunities: Normal, Fighting (cannot hit Ghost!)
Super effective against: Ghost, Psychic
Weak to: Ghost, Dark
Resists: Poison, Bug

Best Ghost Pokemon:
- Gengar: Fast special attacker (Ghost/Poison) — Shadow Ball, Sludge Bomb
- Chandelure: Massive Sp.Atk (Ghost/Fire) — Shadow Ball, Flamethrower
- Aegislash: Incredible ability to switch forms (Ghost/Steel)
- Dusknoir: Bulky physical Ghost — great tank
- Mimikyu: Disguise ability gives a free hit (Ghost/Fairy)

Where to find: Ghost House, Haunted Forest, Ancient Temple

DARK TYPE
Immunities: Psychic (cannot hit Dark!)
Super effective against: Psychic, Ghost
Weak to: Fighting, Bug, Fairy
Resists: Ghost, Dark

Best Dark Pokemon:
- Tyranitar: Massive stats (Dark/Rock) — Crunch, Stone Edge, Earthquake
- Hydreigon: Special attacker (Dark/Dragon) — Dark Pulse, Draco Meteor
- Weavile: Fast physical (Dark/Ice) — Night Slash, Ice Punch
- Umbreon: Ultimate special wall — Foul Play, Moonlight
- Absol: High critical hit rate — Night Slash, Superpower

Where to find: Ghost House, Deep Ocean

GHOST + DARK SYNERGY
Together, Ghost and Dark cover each other:
- Ghost hits Normal types that Dark can't affect? No — Normal is immune to Ghost
- Dark hits Psychic types that trouble Ghost
- Both hit Ghost and Psychic super effectively
- Together only walled by Normal types (Dark covers) and Fairy types

BEST COMBOS
Run Ghost + Dark + Fairy for incredible coverage:
- Ghost for Fighting immunes and Psychic counters
- Dark for Psychic immunity and Ghost counters
- Fairy for Dragon/Dark/Fighting coverage