Gastrodon

#423 Gastrodon 200px Left: West Sea Gastrodon (Sinnohan) Right: East Sea Gastrodon (Sinnohan) Bottom: West Island Gastrodon (Altaran)
National Dex 423 Species Sea Slug Pokémon
Type Sinnoh: Water/Ground Altaris: Water/Poison Abilities Sinnoh: Sticky Hold, Storm Drain, Sand Force (Hidden) Altaris: Sticky Hold, Stench, Poison Touch (Hidden)
Gender Ratio 50% Male Catch Rate 75 EV Yield 2 HP Egg Group Water 1 and Amorphous
Bulbapedia Gastrodon Designer Game Freak

Gastrodon (Japanese: トリトドン Tritodon) is a dual-type Water- and Ground-Type Pokémon introduced in Generation IV. It has an Altaran Regional Variant that is Water- and Poison-Type.

Regardless of form, it evolves from Shellos starting at level 30.

Altaran Gastrodon was designed and sprited by Keileon.

Locations

Location	Encounter Type	% Chance	Time
Evolve Shellos

Stats

	HP	Atk	Def	SpAtk	SpDef	Spd	BST
Sinnoh	111	83	68	92	82	39	475
Altaris	120	60	110	65	115	30	500

Dex Entries

West Sea Gastrodon
It has strong regenerative capabilities. Even if parts of it are bitten off by fish Pokémon, it will return to normal within a few hours.
East Sea Gastrodon
A relative of Shellder and Cloyster, this ocean dweller sometimes comes onto land in search of food.
Altaran Gastrodon
It has a blank stare that can be unnerving to some. As if this wasn't enough, the bright spots on its back warn of foul-tasting and potent toxins to scare any attacking predators away.

Movesets

By Level-Up		By TM		By Level-Up		By TM
Sinnohan				Altaran
Level	Move	TM	Move	Level	Move	TM	Move
		TM17	Protect	Evolve	Toxic	TM17	Protect
1	Mud Slap	TM21	Frustration	1	Acid	TM21	Frustration
1	Mud Sport	TM28	Dig	1	Poison Gas	TM45	Attract
1	Harden	TM45	Attract	1	Harden	TM83	Infestation
1	Water Pulse	TM83	Infestation	1	Water Pulse	TM87	Swagger
2	Mud Sport	TM87	Swagger	2	Poison Gas	By HM
4	Harden	By HM		4	Harden
7	Water Pulse			7	Water Pulse
11	Mud Bomb			11	Sludge
16	Hidden Power			16	Hidden Power
22	Rain Dance			22	Rain Dance
29	Body Slam			29	Body Slam
				37	Sludge Wave
41	Muddy Water
				46	Recover
54	Recover
STAB bonus applies to all moves noted in italics

Evolutions

Shellos	Lv 30 ⟶	Gastrodon
Shellos	Lv 30 ⟶	Gastrodon
Shellos	Lv 30 ⟶	Gastrodon

Sprites

Egg	Normal		Shiny		Metallic		Radiant

Trivia

• West Island Gastrodon is based on a generic, toxic sea slug. It is one of few Regional Variants not to have a specific inspiration source.