Starmie has remained almost completely unchanged from previous generations which means it’s still one of the best water-type Pokemon around. With an amazing move pool at its disposal including the likes of Thunderbolt, Ice Beam, and Psychic, Starmie is capable of delivering huge amounts of damage across a number of types. It’s raised Speed stat is also handy for beating your opponent to the punch.
Toxapex’s attacks may not look great on the surface, but thanks to a combination of defensive moves and abilities, it’ll become the support Pokemon to have in your team this generation. The combination of Baneful Bunker, Recovery, Regenerator, Venoshock and Merciless make Toxapex an effective damage dealer as well as one that can hold its own in a fight.
Gyarados continues to be incredibly strong as it always has been thanks to its powerful move set. Use Dragon Dance to further boost your Attack and Speed stats to unleash even more chaos. You’ll just need to make sure you avoid Electric-type attacks as they’ll put an end to your party in seconds. Rock-type moves are also effective, but other than that Gyrados is a tough nut to crack.
Tapu Fini is an incredibly effective Pokemon to have as a support for a serious damage dealer in your team. Its Telepathy and Misty Surge abilities protects grounded Pokemon from status conditions, and ensures it doesn’t take damage from teammates in double and triple battles. Thanks to its Water and Fairy typing, Tapu Fini also benefits from only being weak to Electric, Grass and Poison type moves. It’s offensive offerings aren’t great, but it does have a bunch of STAB moves to help it deal out some damage.
Primarina follows the same typing as Tapu Fini and benefits from a limited list of weaknesses because of it. While you may want to consider equipping it with Quick Claw to rectify its Speed stat, Primarina’s Liquid Voice ability does alter the type of all sound-based moves to Water. Particularly handy if you run out of PP on your Water moves. Its Special Attack and Defense stats help to make up for its slow Speed.
Pelipper doesn’t exactly look like the most powerful Pokemon and its base stats don’t really argue against that. However, its access to Drizzle and Defog can help clear the field of entry hazards and barriers, as well as further enhance the effectiveness of Rain Dance. If you’ve got a Water-focused team, Pelipper becomes a necessity. Just make sure you don’t send it out against a powerful Electric-type.
Golisopod’s Bug and Water typing allows for it to keep its weaknesses to a minimum. What’s more, Golisopod has some pretty incredible stats to help it deal out some serious damage. Unfortunately, you’ll need to carefully manage its slow Speed and its Emergency Exit ability which will see it automatically switch out when its HP is half or less.
Vaporeon is another Water Pokemon to maintain its status as an incredibly effective ‘mon. It’s capable of dishing out powerful Water-type moves, can take a good amount of damage, and has access to moves such as Acid Armor, Baton Pass, and Wish that make it a great support addition to your team, too.
Sharpedo is a great addition to your team if you’re looking for a bit of extra stopping power in your offensive abilities. Unfortunately, it suffers massively from poor Defense and Sp. Defense stats which make it unlikely to last long in a battle. Combine this with its multitude of weaknesses – Electric, Grass, Fighting, Bug, and Fairy – and you’ve got a hard hitter who can’t take the heat of battle for long.
Araquanid’s base stats don’t really do it many favors when trying to justify it as a great Water-type Pokemon, but thanks to its Water Bubble ability, it has the ability to unleash devastating Water-type attacks. It’s likely you’ll have to switch it out of the way of damage quickly after, though, as it’s got some pretty awful HP and Speed stats. It’s weak against Electric, Flying, and Rock-type moves, so you’re best avoiding these at all costs.
Note: This guide will only focus on non-legendary Water Pokemon and will not include Pokemon like Tapu Fini and Arceus- Water.
Vaporeon is another Water Pokemon to maintain its status as an incredibly effective 'mon. It's capable of dishing out powerful Water-type moves, can take a good amount of damage, and has access to moves such as Acid Armor, Baton Pass, and Wish that make it a great support addition to your team, too.