Gloom is the Weed Pokémon, a dual-type Grass and Poison species that sits in the middle of the Oddish evolution line. First introduced in Generation I as Kanto’s #044, it is best known for the sticky, foul-smelling nectar that drips from its mouth and the flower of reddish-brown petals on its head.
Quick answer: Gloom evolves from Oddish at level 21, then branches into Vileplume with a Leaf Stone or into Bellossom with a Sun Stone.
Gloom evolution line and stones
Gloom is the first evolution of Oddish and the only branch point in the family. The split is decided entirely by which evolution stone you use, so you can build toward either final form from the same Gloom.
| Stage | Pokémon | Method |
|---|---|---|
| Base | Oddish (Grass/Poison) | Starting form |
| First evolution | Gloom (Grass/Poison) | Level 21 |
| Final form A | Vileplume (Grass/Poison) | Leaf Stone |
| Final form B | Bellossom (Grass) | Sun Stone |
One detail worth weighing before you spend a stone: Bellossom drops the Poison typing and becomes a pure Grass-type, while Vileplume keeps the Grass/Poison combination. That choice changes the final Pokémon’s weaknesses, not just its appearance.
Gloom base stats and profile
Gloom is a Special Attacker by design, with its highest stat in Special Attack and a low Speed. It uses the Medium Slow leveling rate and yields 2 Special Attack EVs when defeated. Its catch rate is 120, and it carries a 50/50 gender ratio in mainline games.
| Stat | Value |
|---|---|
| HP | 60 |
| Attack | 65 |
| Defense | 70 |
| Special Attack | 85 |
| Special Defense | 75 |
| Speed | 40 |
| Detail | Value |
|---|---|
| National Dex | #044 |
| Type | Grass / Poison |
| Height | 0.8 m (2’07”) |
| Weight | 8.6 kg (19.0 lbs.) |
| Abilities | Chlorophyll, Stench (Hidden) |
| Egg Group | Grass |
| EV yield | 2 Special Attack |
Gloom type effectiveness, weaknesses, and resistances
As a Grass/Poison Pokémon, Gloom takes extra damage from four common attacking types and shrugs off several others. The Grass typing gives it a particularly strong resistance to incoming Grass moves.
| Matchup | Types |
|---|---|
| Weak to | Fire, Ice, Psychic, Flying |
| Resistant to | Grass, Fighting, Water, Electric |
| Neutral | Normal, Poison, Ground, Steel, Ghost, Dragon, Dark |
| Immune to | None |
Note: Gloom resists Grass attacks at a quarter (1/4x) rather than the usual half, because both of its types reduce Grass damage. Psychic stays a major threat since Poison-types take extra damage from it.
Gloom level-up moves
Gloom leans on absorbing attacks and status powders to wear opponents down. Its level-up set builds toward stronger Grass damage, capping with Petal Dance.
| Level | Move | Type |
|---|---|---|
| 5 | Sweet Scent | Normal |
| 9 | Acid | Poison |
| 13 | Poisonpowder | Poison |
| 15 | Stun Spore | Grass |
| 17 | Sleep Powder | Grass |
| 23 | Mega Drain | Grass |
| 29 | Lucky Chant | Normal |
| 41 | Moonlight | Normal |
| 47 | Giga Drain | Grass |
| 53 | Petal Dance | Grass |
In Generation I, Gloom and its relatives were the only Pokémon that could learn Petal Dance, which made the line a notable pick for Grass coverage at the time.
Gloom in Pokémon GO
In Pokémon GO, Gloom keeps the Grass/Poison typing and reaches a maximum of about 1,900 CP at level 50. Encounters are boosted in Sunny and Cloudy weather, and a Shiny version is available. Its recommended moveset is Acid paired with Sludge Bomb.
| GO stat | Value |
|---|---|
| Attack | 153 |
| Defense | 136 |
| Stamina (HP) | 155 |
| Max CP (Lvl 50) | 1900 |
| Buddy distance | 3 km |
| Base catch rate | 20% |
Gloom is not a top pick as a Grass or Poison attacker, sitting low in those rankings, so most trainers treat it as a stepping stone toward Vileplume or Bellossom rather than a battler in its own right.
If you are deciding what to do with a Gloom, the key fork is the stone. Hold the Leaf Stone for a Grass/Poison Vileplume that keeps Gloom’s matchup spread, or use the Sun Stone for a pure Grass Bellossom that sheds the Poison weaknesses entirely.
