Gloom’s evolution line is one of the more interesting ones out there due to the branching paths. Though Gloom itself doesn’t stand out, it’s worth having to ensure you get Vileplume or Bellossom, but you do need to know how to evolve Gloom if you want any hope of getting either of them.
Though they get their start as grass Pokémon in gen 1, Gloom’s evolution line picks up the poison Pokémon typing down the road, too. As such, we suggest you learn about the grass Pokémon weakness and poison Pokémon weakness to learn how to combat them. We recommend you take a look at Ralts’ evolution for this, as psychic Pokémon are especially effective against Gloom and its various stages.
Here’s everything you need to know about Gloom’s evolution.
Who is Gloom?
Gloom is part of the OG Pokémon lineup, being just number 44 in the Pokédex, evolving from Oddish. An interesting thing about Gloom is that many people think it’s drooling when, really, it’s nectar that the creature uses to attract prey. For humans, while the ooze is sweet, it smells horrific, so you should keep your distance unless you’re one of the few who enjoys the smell.
Where can I catch Oddish?
There’s no point in knowing how to evolve Oddish if you don’t have one, so let’s get you and Oddish. It tends to be an early-game creature, so a standard pokéball should suffice when you try to catch one. Speaking of which this is where you can find Oddish in the Switch games:
- Let’s Go Pikachu – Viridian Forest, Route 1, Route 2, Route 12, Route 13, Route 14, Route 15, Route 21, Route 24, and Route 25
- Let’s Go Eevee – Oddish is exclusive to Let’s Go Pikachu, so you need to trade with another trainer
- Sword and Shield – East Lake Axewell, Dappled Grove, Motostoke Riverbank, Rolling Fields, Watchtower Ruins, Giant’s Cap, Hammerlocke Hills, and North Lake Miloch
- Brilliant Diamond and Shining Pearl – Routes 229, Route 230, and the Grand Underground (Grassland Cave, Riverbank Cave, Swampy Cave, Spacious Cave, Sunlit Cavern, Still-Water Cavern, and Bogsunk Cavern)
- Scarlet and Violet – you can get Oddish through the Terrarium in the coastal biome in the Indigo Disk DLC
How do I evolve Oddish?
Oddish evolves into Gloom at level 21. It’s as simple as that: no items, no stones, just simply battle with Oddish to speed up the leveling process. You can also opt to use a rare candy, should you be lucky enough to have the scarce item.
Where can I catch Gloom?
There’s a way to speed this evolution line up if you want to skip out on Oddish (though that does leave an empty spot in your Pokédex), and go straight after Gloom. If you choose to do this, make sure you have great balls with you, as a standard pokéball isn’t likely to get the job done.
You can find this Gloom in the following places on Switch:
- Let’s Go Pikachu – Route 12, Route 13, Route 14, Route 15, and Route 21
- Let’s Go Eevee – Gloom is exclusive to Let’s Go Pikachu, so you need to trade with another trainer to get it
- Sword and Shield – Giant’s Mirror, Axew’s Eye, East Lake Axewell, North Lake Miloch, Giant’s Cap, Dappled Grove, Giant’s Cap, Hammerlocke Hills, and Motostoke Riverbank
- Brilliant Diamond and Shining Pearl – Route 224, Route 229, Route 230, and the Grand Underground (Spacious Cave, Grassland Cave, Swampy Cave, Riverbank Cave, Still-Water Cavern, Swampy Cave, Sunlit Cavern, and Bogsunk Cavern)
- Scarlet and Violet – you can get Oddish through the Terrarium in the coastal biome in the Indigo Disk DLC
How do I evolve Gloom into Vileplume?
To evolve Gloom into its original evolution, Vileplume, you need to use a leaf stone, the same stone you have to use to get Leafeon, one of the Eevee evolutions. Luckily, it’s easy to get your hands on. Here’s how you can get one:
- Let’s Go Pikachu and Let’s Go Eevee – Route 2, Victory Road, and Celadon Department Store
- Sword and Shield – Turffield, Lake of Outrage, the Bridge Field Digging Duo, and as a poke job reward for tier III, IV, and IX
- Brilliant Diamond and Shining Pearl – Floaroma Forest and the Grand Underground
- Scarlet and Violet – Tagtree Thicket, Artazon, Delibird presents, Terra Raid Battles, and Wistful Fields (you need The Teal Mask expansion to access this area)
How do I evolve Gloom into Bellossom?
If it’s Bellossom that you’re after, you need to give Gloom a sun stone. Like the leaf stone, there are various methods to get one:
- Sword and Shield – explore Dusty Bowl, see if a Pokémon with pickup ability collects one, try your luck with the Digging Duo in the Bridge Field, and catch a wild Solrock (it has a 5% chance of holding a sun stone)
- Brilliant Diamond and Shining Pearl – you can catch a wild Solrock (it has a 5% chance of holding a sun stone) or explore the Grand Underground
- Scarlet and Violet – you can find them in Area Zero, East Province (Area Three), West Province (Area One), Artazon, Porto Marinada auction, and Paradise Barrens (you need The Teal Mask expansion to access this area)
Before you get your hopes up, you can’t evolve Gloom into Bellossom in Let’s Go Pikachu and Let’s Go Eevee, as the gen 2 Pokémon isn’t part of the Kanto Pokédex.
Where can I catch Bellossom?
Bellossom is obtainable without the need for evolutions, though as a stage three creature, it’s considerably stronger than both Gloom and Oddish, so make sure you have plenty of ultra balls on hand if you want to catch it. Here’s where you can find Bellossom:
- Sword and Shield – Giant’s Mirror and Dappled Grove
- Scarlet and Violet – you can find Bellossom in the Terrarium in the Indigo Disk DLC. It’s in the coastal biome
Where can I catch Vileplume?
You can catch Vileplume outright in numerous games, though it’s considerably harder to get than an Oddish or Gloom. If you want to bypass the other two, make sure you bring plenty of ultra balls, as Vileplume won’t go down easily. Here’s where you can find Vileplume:
- Let’s Go Pikachu – Route 21
- Sword and Shield – Dappled Grove, Giant’s Mirror, Giant’s Cap, Hammerlocke Hills, East Lake Axewell, Motostoke Riverbank, and North Lake Miloch
- Scarlet and Violet – you can find Vileplume in the coastal biome in the Terrarium in the Indigo Disk DLC
How do I evolve Gloom in Pokémon Go?
To start with, you can evolve Oddish into Gloom with 25 candies and then give Gloom 100 candies to get Vileplume. If it’s Bellossom that you’re after, you need to have both 100 candies and a sun stone on hand. Visiting Poké stops is the best way to get them.
Now that you know everything about Gloom’s evolution, allow us to teach you about Scyther’s evolution, Rockruff’s evolution, and Salandit’s evolution. We can also tell you all about the dark Pokémon weakness, psychic Pokémon weakness, and ghost Pokémon weakness if you need some help beating those fiendish ‘mon.