How do you evolve Gloom?

Into Vileplume: Use Leaf Stone. Into Bellossom: Use Sun Stone.

Gloom is a dual Grass/Poison type Pokémon.

What is Gloom weak to?

Gloom is Grass/Poison. It takes 2× from Fire, Ice, Flying and Psychic.

No. 0044 · Gen 1

Modest: Hits harder and drops Attack, which it won’t use.

Hit GLOOM with Fire, Ice, Flying and Psychic for 2× damage.

2×Super effective

½×Not very effective

¼×Barely scratches it

In Pokémon GO: Fire deals 1.6× instead of 2×. GO chart

ModestHits harder and drops Attack, which it won’t use.

Worked out from base stats. Your team may need something else.

Defeating Gloom gives 2 Sp. Atk EVs.

Your game

Level 21
GloomGrassPoison
- Use Leaf Stone
  VileplumeGrassPoison
- Use Sun Stone
  BellossomGrass

The strongest attacking move it can learn in each type, across all games. Not every game has every move. Same-type moves get a 1.5× bonus.

Type	Move	Kind	Power
Grass	Leaf Stormsame type	Special	130
Normal	Double-Edge	Physical	120
Fairy	Moonblast	Special	95
Poison	Sludge Bombsame type	Special	90
Bug	Pollen Puff	Special	90
Fighting	Drain Punch	Physical	75

Regular Pokémon whose same-type moves hit it hard and who take little from its same-type moves. Picked from types and base stats only, not movesets.