Where Do Poison Type Pokémon Spawn in Cobblemon? Full List 2026

Quick Answer

🌿 Swamps 🌲 Dense Forest 🕳️ Caves 24 Poison Types Total

Poison types are spread across swamp biomes, dense forest floors, cave systems and overgrown areas. Common ones like Ekans and Nidoran appear early in grassland and plains exploration. The stronger lines like Gengar's chain or Muk favour darker, more enclosed environments — sewers, caves and heavy vegetation.

How Poison Type Spawning Works

Poison types in Cobblemon are tied to environments that feel damp, overgrown or murky. Swamp biomes are the single best hunting ground for variety — you'll find multiple poison lines clustered there. Dense forest biomes run a close second, especially at night when the nocturnal species come out.

A key split with poison types is land versus underground. Ekans, Nidoran and Bellsprout are surface spawners that prefer open vegetation. Grimer and the Gastly line lean heavily into dark, enclosed spaces. Then there's a third group — the bug-poison types like Spinarak and Weedle that hug forest floors and tall grass edges.

☠️

Swamps are the poison type's home turf If you're specifically hunting poison types, swamp and mangrove biomes offer the highest density. You'll encounter Ekans, Croagunk, Gulpin, Bellsprout and Tentacool-adjacent spawns all within the same area.

💡

Night makes a big difference for poison hunts Several poison types only appear or have much higher spawn rates after dark — especially Gastly, Haunter, Spinarak and Zubat. If you're exploring caves or forests during the day and coming up empty, try returning at night.

Full Poison Type Spawn List

Every poison type in Cobblemon v1.7.1 with their biome locations and spawn conditions. Filter by rarity or time of day.

All Common Uncommon Rare Very Rare

All Day Night Any time

Showing 24 Pokémon

Pokémon	Types	Biomes	Time	Rarity
Ekans#0023	Poison	Grasslands, Plains, Savanna Edge	Any	Common
Nidoran♀#0029	Poison	Plains, Meadows, Forest Edge	Any	Common
Nidoran♂#0032	Poison	Plains, Meadows, Forest Edge	Any	Common
Zubat#0041	Poison Flying	Caves, Caverns, Underground	Night	Common
Oddish#0043	Grass Poison	Forests, Flower Fields, Lush Biomes	Night	Common
Bellsprout#0069	Grass Poison	Swamps, Jungle, Warm Forest	Any	Common
Gastly#0092	Ghost Poison	Caves, Dense Forest, Dark Biomes	Night	Common
Spinarak#0167	Bug Poison	Forest Floors, Jungle, Overgrown Areas	Night	Common
Weedle#0013	Bug Poison	Forests, Plains Edge, Tall Grass	Day	Uncommon
Grimer#0088	Poison	Swamps, Caves, Polluted Terrain	Night	Uncommon
Koffing#0109	Poison	Caves, Underground Voids, Dark Areas	Any	Uncommon
Gulpin#0316	Poison	Swamps, Marshes, Damp Forest	Any	Uncommon
Budew#0406	Grass Poison	Flower Fields, Meadows, Forest Clearings	Day	Uncommon
Croagunk#0453	Poison Fighting	Swamps, Mangrove, Warm Shallow Water	Any	Uncommon
Trubbish#0568	Poison	Villages, Urban Terrain, Caves	Any	Uncommon
Foongus#0590	Grass Poison	Forests, Mushroom Biomes, Damp Areas	Any	Uncommon
Toxel#0848	Electric Poison	Plains, Settlements, Scrubland	Any	Uncommon
Haunter#0093	Ghost Poison	Dense Forest, Caves, Abandoned Structures	Night	Rare
Qwilfish#0211	Water Poison	Oceans, Rivers, Mangrove Waters	Any	Rare
Roselia#0315	Grass Poison	Flower Forests, Meadows, Lush Caves	Day	Rare
Stunky#0434	Poison Dark	Forests, Scrubland, Plains at Night	Night	Rare
Mareanie#0747	Poison Water	Warm Oceans, Coral Reefs, Beaches	Any	Rare
Gengar#0094	Ghost Poison	Deep Caves, Abandoned Structures	Night	Very Rare
Muk#0089	Poison	Swamp Depths, Cave Floors	Night	Very Rare

Poison Types by Biome

Different environments host different poison type clusters. Here's where to focus your search depending on what you're hunting.

🌿

Swamp & Mangrove

Best overall poison variety

Swamp biomes are the clear number-one destination for poison type hunting. Bellsprout, Gulpin, Croagunk and Grimer all cluster here. Mangrove swamps add Mareanie to the mix in warmer variants. If you want to tick off multiple poison lines quickly, this is your starting point.

🌲

Forest & Jungle

Night hunting especially productive

Dense forests host Oddish (night), Spinarak (night) and the Gastly chain after dark. During the day, Weedle, Budew and Foongus can be found on forest floors. Jungle biomes boost Bellsprout spawns significantly. This is the best biome type for building a mixed grass-poison team.

🕳️

Caves & Underground

Zubat, Koffing, Gastly chain

Caves are home to Zubat (common at night), Koffing and the Grimer line. Deeper cave systems improve your odds of finding Haunter. Gengar is possible in deep underground areas but is a genuinely rare encounter — bring plenty of Poké Balls.

🌾

Plains & Grasslands

Nidoran family, Ekans

Open plains are the easiest place to find Ekans, Nidoran♀ and Nidoran♂ — all common spawns here. Toxel also shows up in plains and settlement-adjacent areas. These are your go-to early poison catches before you start exploring more specialised terrain.

🌊

Ocean & Coastal Water

Qwilfish, Mareanie

The water-poison types need specific ocean hunting. Qwilfish can be found in rivers and oceans but is a rare encounter. Mareanie is tied to warm ocean and coral reef biomes — look for it in tropical or warm ocean variants rather than cold oceans.

Tips for Hunting Poison Types

✅

Start with swamp biomes If you need poison types early and efficiently, head straight to the nearest swamp. You'll find Bellsprout, Gulpin and Croagunk all in one location without having to bounce between biomes.

🌙

Come back at night for ghost-poison lines Gastly, Haunter and the rarer Gengar are almost exclusively nocturnal. If you're after the Gengar line, plan for a cave or abandoned structure run after sunset — daytime exploration won't cut it.

⚠️

Muk is rare — don't expect a fast find Muk can appear in swamp depths and cave floors at night, but it's a very rare spawn. Most players end up evolving Grimer rather than finding a wild Muk. Focus on finding Grimer first and evolving at level 38.

Explore Other Type Spawns

Looking for a different type? Here are the other spawn guides in the series.

🌿 Grass 💧 Water 🔥 Fire 🪨 Rock ⚙️ Steel 🥊 Fighting ☠️ Poison 🏜️ Ground ⚡ Electric 👻 Ghost 📋 All Types

What Next?

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Spawn Hub

See every type spawn page in one place — the full index for all 18 types.

Related Type

Grass Type Spawns

Many poison types share biomes with grass types — check this guide to fill out your team.