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.

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Meganium

#154 in the National Pokédex • Herb Pokémon

Normal

Shiny

Bayleef Cyndaquil

Pokédex entries

FireRed

MEGANIUM’s breath has the power to revive dead grass and plants. It can make them healthy again.

LeafGreen

The aroma that rises from its petals contains a substance that calms aggressive feelings.

Details

Type

Weak to

2×

2×

2×

2×

2×

Resists

0.5×

0.5×

0.5×

Growth

EV yield, catch rate, and experience details for this Pokémon.

EV yield	1 Def, 2 SpD
Catch rate	45
Base Exp.	208

Eggs

Egg groups, gender ratio, and hatching details for this Pokémon.

Egg groups	Monster Grass
Gender	87.5% male 12.5% female
Egg cycles	20 (5,375 steps)

Evolution

Evolution requirements shown in a compact table or chain view.

Pokémon	Requires	Evolution
Chikorita #152	Level 16 This line requires importing Pokémon from another Generation III game on GBA; unavailable on Switch. Requires the National Pokédex.	Bayleef #153
Bayleef #153	Level 32 This line requires importing Pokémon from another Generation III game on GBA; unavailable on Switch. Requires the National Pokédex.	Meganium #154

Moves

Moves this Pokémon learns naturally by reaching specific levels.

		Class				Description
Start	Tackle	Physical	35	95	35	A physical attack in which the user charges, full body, into the foe.
Start	Growl	Status	-	100	40	The user growls in a cute way, making the foe lower its ATTACK stat.
Start	Razor Leaf	Special	55	95	25	The foe is hit with a cutting leaf. It has a high critical-hit ratio.
Start	Reflect	Status	-	-	20	A wall of light cuts damage from physical attacks for five turns.
8	Razor Leaf	Special	55	95	25	The foe is hit with a cutting leaf. It has a high critical-hit ratio.
12	Reflect	Status	-	-	20	A wall of light cuts damage from physical attacks for five turns.
15	Poison Powder	Status	-	75	35	A cloud of toxic dust is scattered. It may poison the foe.
23	Synthesis	Status	-	-	5	Restores the user’s HP. The amount of HP regained varies with the weather.
31	Body Slam	Physical	85	100	15	The user drops its full body on the foe. It may leave the foe paralyzed.
41	Light Screen	Status	-	-	30	A wall of light cuts damage from SP. ATK attacks for five turns.
51	Safeguard	Status	-	-	25	It protects the user’s party from all status problems for five turns.
61	Solar Beam	Special	120	100	10	A 2-turn move that blasts the foe with absorbed energy in the 2nd turn.

Machine compatibility for Generation III. HM08 Dive cannot be obtained in FireRed or LeafGreen; a Pokémon must learn it in another Generation III game and be traded in on GBA. Switch has no incoming transfers from those games.

		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.
TM15	Hyper Beam	Physical	150	90	5	A severely damaging attack that makes the user rest on the next turn.
TM16	Light Screen	Status	-	-	30	A wall of light cuts damage from SP. ATK attacks for five turns.
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.
TM23	Iron Tail	Physical	100	75	15	An attack with a steel-hard tail. It may lower the foe’s DEFENSE stat.
TM26	Earthquake	Physical	100	100	10	An earthquake that strikes all Pokémon in battle excluding the user.
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.
TM33	Reflect	Status	-	-	20	A wall of light cuts damage from physical attacks for five turns.
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.
HM01	Cut	Physical	50	95	30	A basic attack. It can be used to cut down thin trees and grass.
HM04	Strength	Physical	80	100	15	The foe is slugged at maximum power. Can also be used to move boulders.
HM05	Flash	Status	-	70	20	A blast of light that cuts the foe’s accuracy. It also illuminates caves.
HM06	Rock Smash	Physical	20	100	15	An attack that may also cut DEFENSE. It can also smash cracked boulders.

Tutors

Moves this Pokémon can learn from move tutors in this game.

	Class				Description
Body Slam	Physical	85	100	15	The user drops its full body on the foe. It may leave the foe paralyzed.
Counter	Physical	-	100	20	A retaliation move that counters any physical hit with double the damage.
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.

Traits

Ability options available to this Pokémon in this game.

Overgrow

Ups GRASS moves in a pinch.

Strengthens Grass moves to inflict 1.5× damage at 1/3 max HP or less.

#153

Bayleef

#155

Cyndaquil

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