Gastrodon

Sticky Hold
This Pokémon's item cannot be removed. Increases chance of encountering Pokémon while fishing.
Storm Drain
All Water attacks hit this Pokémon.
Type Tier
Water / Ground UU
Statistics
Min- Min Max Max+
HP
111
- 363 426 -
Atk
83
181 202 265 291
Def
68
154 172 235 258
SpA
92
198 220 283 311
SpD
82
180 200 263 289
Spe
39
102 114 177 194
Name Item Ability Nature

Mixed Attacker

Leftovers Sticky Hold Relaxed
Moveset EVs
~ Earthquake
~ Ice Beam
~ Surf / Toxic
~ Recover
212 HP / 252 Def / 44 SpA

Look familiar? Yep, this is essentially a Swampert with Recover. Gastrodon gets good type coverage with this set, and with instant recovery, you can expect him to hang around a turn or two. Toxic is great on Gastrodon as he scares off most Steels and Poisons with Earthquake, so it can really help him wear down opponents.

Name Item Ability Nature

Curse

Leftovers Sticky Hold Careful
Moveset EVs
~ Curse
~ Earthquake
~ Ice Beam / Stone Edge
~ Recover
212 HP / 44 Def / 252 SpD

Look familiar? Yep, this is essentially a Swam...oh, I did that already. Boost Gastrodon's physical stats with Curse, and Recover off the damage. Then, attack with a pumped up Earthquake. Both Ice Beam and Stone Edge are good for type coverage, although the former won't benefit from Curse—it does help to wear down Grass-types though.

Name Item Ability Nature

Stockpile

Leftovers Sticky Hold Quiet
Moveset EVs
~ Stockpile
~ Recover
~ Earthquake / Toxic
~ Ice Beam / Water Pulse / Surf
212 HP / 44 Def / 252 SpA

Thankfully, I can't use the same opening line here. This is something Swampert can't do. Stockpile boosts both of Gastrodon's defensive stats, which can make him tough to take down, especially when he can Recover at will. Earthquake and Ice Beam again provide him good type coverage. Toxic is a great alternative for a more stall based set. Water Pulse gives him some way to do direct damage, and the confusion rate can help wear down poisoned opponents and give you more time to boost and heal. Surf is an option if you prefer more power to possible confusion. Earthquake is also a good choice in the last slot, even if you go with Toxic. This is mainly to stop the likes of Tentacruel and Qwilfish from walling you. Both Earthquake and Water Pulse hit most of the Steel-types Gastrodon is likely to face, as most are weak to Water, and 4x weak to Ground.

Name Item Ability Nature

Counter

Leftovers Sticky Hold Modest
Moveset EVs
~ Amnesia
~ Counter
~ Recover
~ Surf
212 HP / 96 SpA / 200 SpD

The idea of this set is to lure in physical attackers and reflect their moves right back at them. Amnesia should lure in physical attacks, which can then be Countered.

Other Options

Yawn is a good option to phaze opponents or induce Sleep. Rest and Sleep Talk if you need something to absorb status. Memento can help a team member set up if you're willing to sacrifice Gastrodon. Mirror Coat can catch some special attackers off guard, particularly some weaker Hidden Power Grass users. Hidden Power Electric hurts Gyarados and Mantine, while Hidden Power Grass hits Quagsire and other Gastrodon.

EVs

For the first set, max out Defense and put 212 EVs in HP for Leftovers recovery. The remaining EVs can go in Special Attack. Use a Relaxed nature.

The Curse set should have plenty of HP and Special Defense, with the rest in Defense.

For Counter, you'll want lots of HP first, then add some Special Defense and Special Attack.

The Stockpile set should focus on HP and Special Attack if you're using Ice Beam or Water Pulse. Quiet nature if you're using Earthquake/Ice Beam, Modest if you're using Water Pulse or Adamant if Earthquake is your only attack.

Opinion

Gastrodon has great typing, a good movepool and fairly decent stats. Access to Recover is a huge plus, and is something big brother Swampert would kill for. Unfortunately, he is lacking in a very important stat for his role: Defense. Despite his high HP, this makes it difficult for him to take hits in the same way Swampert does. Recover and a much better Special Attack is what makes him stiff competition for Quagsire in the lower tiers, although he does have that handy Water Absorb. Overall, Gastrodon is a good defensive Pokémon—he is just a little lacking in Defense to make him the preferred choice to Swampert for most competitive teams.

Counters

Meganium does well, but can't afford to take too many hits from Ice Beam. Grumpig and Hypno both do a good job of sponging his special attacks, and his rather weak Earthquake is not much of a threat to either of them. Water-types like Mantine and Blastoise can take him on if they carry Toxic.