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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Marshtomp

#259 in the National Pokédex • Mud Fish Pokémon

Normal

Shiny

Mudkip Swampert

Pokédex entries

FireRed

It is at its best when on muddy ground with poor footing. It quickly overwhelms foes struggling in mud.

LeafGreen

It is at its best when on muddy ground with poor footing. It quickly overwhelms foes struggling in mud.

Details

Types

Weak to

4×

Resists

0.5×

0.5×

0.5×

0.5×

Immune to

0×

Growth

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

EV yield	2 Atk
Catch rate	45
Base Exp.	143

Eggs

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

Egg groups	Monster Water 1
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
Mudkip #258	Level 16 This line requires importing Pokémon from another Generation III game on GBA; unavailable on Switch. Requires the National Pokédex.	Marshtomp #259
Marshtomp #259	Level 36 This line requires importing Pokémon from another Generation III game on GBA; unavailable on Switch. Requires the National Pokédex.	Swampert #260

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	Water Gun	Special	40	100	25	The foe is struck with a lot of water expelled forcibly from the mouth.
Start	Mud-Slap	Physical	20	100	10	Mud is hurled in the foe’s face to inflict damage and lower its accuracy.
6	Mud-Slap	Physical	20	100	10	Mud is hurled in the foe’s face to inflict damage and lower its accuracy.
10	Water Gun	Special	40	100	25	The foe is struck with a lot of water expelled forcibly from the mouth.
15	Bide	Physical	-	-	10	The user endures attacks for two turns, then strikes back double.
16	Mud Shot	Physical	55	95	15	The user attacks by hurling mud. It also reduces the foe’s SPEED.
20	Foresight	Status	-	-	40	Completely negates the foe’s efforts to heighten its ability to evade.
25	Mud Sport	Status	-	-	15	Weakens ELECTRIC-type attacks while the user is in the battle.
31	Take Down	Physical	90	85	20	A reckless, full-body charge attack that also hurts the user a little.
37	Muddy Water	Special	95	85	10	The user attacks with muddy water. It may also lower the foe’s accuracy.
42	Protect	Status	-	-	10	Enables the user to evade all attacks. It may fail if used in succession.
46	Earthquake	Physical	100	100	10	An earthquake that strikes all Pokémon in battle excluding the user.
53	Endeavor	Physical	-	100	5	Gains power the fewer HP the user has compared with the foe.

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
TM03	Water Pulse	Special	60	100	20	An attack with a pulsing blast of water. It may also confuse the foe.
TM06	Toxic	Status	-	85	10	A move that badly poisons the foe. Its poison damage worsens every turn.
TM07	Hail	Status	-	-	10	A hailstorm lasting five turns damages all Pokémon except the ICE-type.
TM10	Hidden Power	Physical	-	100	15	An attack that varies in type and intensity depending on the user.
TM13	Ice Beam	Special	95	100	10	The foe is struck with an icy beam. It may freeze the foe solid.
TM14	Blizzard	Special	120	70	5	The foe is blasted with a blizzard. It may freeze the foe solid.
TM17	Protect	Status	-	-	10	Enables the user to evade all attacks. It may fail if used in succession.
TM18	Rain Dance	Status	-	-	5	A heavy rain falls for five turns, powering up WATER-type moves.
TM21	Frustration	Physical	-	100	20	This attack move grows more powerful the less the user likes its TRAINER.
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.
TM28	Dig	Physical	60	100	10	An attack that hits on the 2nd turn. Can also be used to exit dungeons.
TM32	Double Team	Status	-	-	15	The user creates illusory copies of itself to raise its evasiveness.
TM39	Rock Tomb	Physical	50	80	10	Boulders are hurled at the foe. It also lowers the foe’s SPEED if it hits.
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.
HM03	Surf	Special	95	100	15	A big wave crashes down on the foe. Can also be used for crossing water.
HM04	Strength	Physical	80	100	15	The foe is slugged at maximum power. Can also be used to move boulders.
HM06	Rock Smash	Physical	20	100	15	An attack that may also cut DEFENSE. It can also smash cracked boulders.
HM07	Waterfall	Special	80	100	15	A powerful charge attack. It can also be used to climb a waterfall.
HM08	Dive	Special	60	100	10	The user dives underwater on the first turn and strikes next turn.

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.
Mega Kick	Physical	120	75	5	The foe is attacked by a kick fired with muscle-packed power.
Mega Punch	Physical	80	85	20	The foe is slugged by a punch thrown with muscle-packed power.
Mimic	Status	-	-	10	The user copies the move last used by the foe for the rest of the battle.
Rock Slide	Physical	75	90	10	Large boulders are hurled at the foe. It may make the foe flinch.
Seismic Toss	Physical	-	100	20	A gravity-fed throw that causes damage matching the user’s level.
Substitute	Status	-	-	10	The user creates a decoy using one-quarter of its full HP.

Traits

Ability options available to this Pokémon in this game.

Torrent

Ups WATER moves in a pinch.

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

#258

Mudkip

#260

Swampert

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