Edition differences: original GBA and Nintendo Switch (2026)
Battle data describes Generation III rules. Availability notes distinguish native catches, evolution and breeding from original GBA imports. GBA games can trade with compatible Generation III games after the network quest; Switch supports local FireRed/LeafGreen trading and cannot import Pokémon from other games. Transfers to Pokémon HOME are one way.
GBA: AuroraTicket and MysticTicket required historical event distributions. Switch: both tickets are added after entering the Hall of Fame, providing access to Deoxys on Birth Island and Lugia/Ho-Oh on Navel Rock. Other event Pokémon and GBA imports are not made available by these tickets.
Original GBA: a roaming Entei or Raikou that successfully ends an encounter with Roar disappears permanently because of a game bug. The Switch editions fix this Roar disappearance bug.
Shroomish
#285 in the National Pokédex • Mushroom Pokémon
Normal
Shiny
Pokédex entries
FireRed
It prefers damp places. By day it remains still in the forest shade. It releases toxic powder from its head.
LeafGreen
It prefers damp places. By day it remains still in the forest shade. It releases toxic powder from its head.
Details
Type
Category
Ability
Height
Weight
National Pokédex
Stats
Min
Max
HP
60
230
324
Attack
40
76
196
Defense
60
112
240
Sp. Atk
40
76
196
Sp. Def
60
112
240
Speed
35
67
185
Total
295
Ranges are for Level 100. Max assumes a beneficial nature, 252 EVs, and 31 IVs; min assumes a hindering nature, 0 EVs, and 0 IVs.
Game availability
GBA: requires importing from another Generation III game.Switch: unavailable. This page documents the supported Generation III Pokémon.
Growth
| EV yield | 1 HP |
|---|---|
| Catch rate | 255 |
| Base Exp. | 65 |
Evolution
| Pokémon | Requires | Evolution |
|---|---|---|
Shroomish #285 | Level 23 This line requires importing Pokémon from another Generation III game on GBA; unavailable on Switch. Requires the National Pokédex. |  Breloom #286 |
Moves
| Class | Description | ||||||
|---|---|---|---|---|---|---|---|
| Start | Absorb | |  Special | 20 | 100 | 20 | An attack that absorbs half the damage it inflicted to restore HP. |
| 4 | Tackle |  |  Physical | 35 | 95 | 35 | A physical attack in which the user charges, full body, into the foe. |
| 7 | Stun Spore | |  Status | - | 75 | 30 | Paralyzing dust is scattered wildly. It may paralyze the foe. |
| 10 | Leech Seed | | Status | - | 90 | 10 | A seed is planted on the foe to steal some HP for the user on every turn. |
| 16 | Mega Drain | | Special | 40 | 100 | 10 | A tough attack that drains half the damage it inflicted to restore HP. |
| 22 | Headbutt | | Physical | 70 | 100 | 15 | The user sticks its head out and rams. It may make the foe flinch. |
| 28 | Poison Powder |  | Status | - | 75 | 35 | A cloud of toxic dust is scattered. It may poison the foe. |
| 36 | Growth | | Status | - | - | 40 | The user’s body is forced to grow, raising the SP. ATK stat. |
| 45 | Giga Drain | | Special | 60 | 100 | 5 | A harsh attack that absorbs half the damage it inflicted to restore HP. |
| 54 | Spore | | Status | - | 100 | 15 | The user scatters bursts of fine spores that induce sleep. |
| Class | Description | ||||||
|---|---|---|---|---|---|---|---|
| TM06 | Toxic | | Status | - | 85 | 10 | A move that badly poisons the foe. Its poison damage worsens every turn. |
| TM09 | Bullet Seed | | Special | 10 | 100 | 30 | The user shoots seeds at the foe. Two to five seeds are shot at once. |
| TM10 | Hidden Power | | Physical | - | 100 | 15 | An attack that varies in type and intensity depending on the user. |
| TM11 | Sunny Day |  | Status | - | - | 5 | The sun blazes for five turns, powering up FIRE-type moves. |
| TM17 | Protect | | Status | - | - | 10 | Enables the user to evade all attacks. It may fail if used in succession. |
| TM19 | Giga Drain | | Special | 60 | 100 | 5 | A harsh attack that absorbs half the damage it inflicted to restore HP. |
| TM20 | Safeguard | | Status | - | - | 25 | It protects the user’s party from all status problems for five turns. |
| TM21 | Frustration | | Physical | - | 100 | 20 | This attack move grows more powerful the less the user likes its TRAINER. |
| TM22 | Solar Beam | | Special | 120 | 100 | 10 | A 2-turn move that blasts the foe with absorbed energy in the 2nd turn. |
| TM27 | Return | | Physical | - | 100 | 20 | This attack move grows more powerful the more the user likes its TRAINER. |
| TM32 | Double Team | | Status | - | - | 15 | The user creates illusory copies of itself to raise its evasiveness. |
| TM36 | Sludge Bomb | | Physical | 90 | 100 | 10 | Filthy sludge is hurled at the foe. It may poison the target. |
| TM42 | Facade | | Physical | 70 | 100 | 20 | An attack that is boosted if user is burned, poisoned, or paralyzed. |
| TM43 | Secret Power | | Physical | 70 | 100 | 20 | An attack that may have an additional effect that varies with the terrain. |
| TM44 | Rest |  | Status | - | - | 10 | The user sleeps for two turns to fully restore HP and heal any status problem. |
| TM45 | Attract | | Status | - | 100 | 15 | If it is the other gender, the foe is made infatuated and unlikely to attack. |
| TM49 | Snatch |  | Status | - | - | 10 | Steals the effects of the foe’s healing or status-changing move. |
| HM05 | Flash | | Status | - | 70 | 20 | A blast of light that cuts the foe’s accuracy. It also illuminates caves. |
Tutors
| Class | Description | |||||
|---|---|---|---|---|---|---|
| Body Slam | | Physical | 85 | 100 | 15 | The user drops its full body on the foe. It may leave the foe paralyzed. |
| Double-Edge | | Physical | 120 | 100 | 15 | A reckless, life-risking tackle that also hurts the user a little. |
| Mimic | | Status | - | - | 10 | The user copies the move last used by the foe for the rest of the battle. |
| Substitute | | Status | - | - | 10 | The user creates a decoy using one-quarter of its full HP. |
| Swords Dance | | Status | - | - | 30 | A frenetic dance of fighting. It sharply raises the ATTACK stat. |
Breeding
| Class | Description | |||||
|---|---|---|---|---|---|---|
| Charm | | Status | - | 100 | 20 | The foe is charmed by the user’s cute appeals, sharply cutting its ATTACK. |
| Fake Tears | | Status | - | 100 | 20 | The user feigns crying to sharply lower the foe’s SP. DEF stat. |
| False Swipe | | Physical | 40 | 100 | 40 | A restrained attack that always leaves the foe with at least 1 HP. |
| Helping Hand | | Status | - | - | 20 | A move that boosts the power of the ally’s attack in a battle. |
| Swagger | | Status | - | 90 | 15 | A move that makes the foe confused, but also sharply raises its ATTACK. |
Traits
Effect Spore
Leaves spores on contact.
Has a 10% chance of inflicting either paralysis, poison, or sleep on attacking Pokémon on contact.
