What to Use:
Politoed @ Damp Rock
Ability: Drizzle
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
-Scald
-Ice Beam
-Perish Song
-Toxic
Role: Support (rain support)
What it Does: Politoed's role this gen is largely the same as it was in Gen V, but with one major change: rain is no longer permanent. Now, to make rain feasible, Politoed has to carry Damp Rock to keep the rain going as long as possible. His moveset is very utility based. Scald is for spreading burns, Toxic is obviously for putting a timer on an opponent's wall or sweeper, Ice Beam is for coverage and the slim chance of freeze, and Perish Song is great for taking out a dangerous sweeper or Choice-locked opponent that doesn't do much to your trapper. Last gen, Poli had a couple more roles as a Specs sweeper or just a regular special sweeper, but now since perma rain isn't a thing anymore, his only real option is this support set. But as limited as Poli may seem, he is very good at his job. With DrizzleSwim being made legal again, he may arguably be better than last gen at supporting a Rain team.
Good Teammates: Good teammates for Politoed would be mons who can abuse Swift Swim, such as Kabutops and Kingdra. Both of these pokemon are deadly in rain, outspeeding the entire unboosted tier by reaching the blazing speeds of 568 and 590, respectively. Other good teammates include those who can offer more Rain Dance support. Politoed won't last forever in a battle, so it's important to have at least one other rain setter to get as many turns of rain as possible. And even more teammates could include Dugtrio and Gothitelle. After Politoed uses Perish Song, you will want to switch to whichever one you prefer to have on your team and then deal with the trapped pokemon. You could also handicap the trapped pokemon further by using the gimmicky Entrainment Durant, but I wouldn't advise this as it really just wastes a teamslot.
What Counters It: A good counter to Politoed is Tyranitar or Hippowdon as they are slower weather inducers, so a sandstorm would replace the rain, rendering Politoed useless and forcing a switch. AV Tyranitar is an especially good counter, as it replaces the rain, and has ridiculously high Special Defense, which eliminates all offensive presence that Poli has. Another good counter is Mega Venusaur, as it can survive a Scald or an Ice Beam, is immune to Toxic, and then KO with Giga Drain.
Any Additional Info: Politoed will have to switch in several times throughout a battle, so it's important to keep him as healthy as possible and clear of status, so keep that in mind when building your team.
Politoed @ Damp Rock
Ability: Drizzle
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
-Scald
-Ice Beam
-Perish Song
-Toxic
Role: Support (rain support)
What it Does: Politoed's role this gen is largely the same as it was in Gen V, but with one major change: rain is no longer permanent. Now, to make rain feasible, Politoed has to carry Damp Rock to keep the rain going as long as possible. His moveset is very utility based. Scald is for spreading burns, Toxic is obviously for putting a timer on an opponent's wall or sweeper, Ice Beam is for coverage and the slim chance of freeze, and Perish Song is great for taking out a dangerous sweeper or Choice-locked opponent that doesn't do much to your trapper. Last gen, Poli had a couple more roles as a Specs sweeper or just a regular special sweeper, but now since perma rain isn't a thing anymore, his only real option is this support set. But as limited as Poli may seem, he is very good at his job. With DrizzleSwim being made legal again, he may arguably be better than last gen at supporting a Rain team.
Good Teammates: Good teammates for Politoed would be mons who can abuse Swift Swim, such as Kabutops and Kingdra. Both of these pokemon are deadly in rain, outspeeding the entire unboosted tier by reaching the blazing speeds of 568 and 590, respectively. Other good teammates include those who can offer more Rain Dance support. Politoed won't last forever in a battle, so it's important to have at least one other rain setter to get as many turns of rain as possible. And even more teammates could include Dugtrio and Gothitelle. After Politoed uses Perish Song, you will want to switch to whichever one you prefer to have on your team and then deal with the trapped pokemon. You could also handicap the trapped pokemon further by using the gimmicky Entrainment Durant, but I wouldn't advise this as it really just wastes a teamslot.
What Counters It: A good counter to Politoed is Tyranitar or Hippowdon as they are slower weather inducers, so a sandstorm would replace the rain, rendering Politoed useless and forcing a switch. AV Tyranitar is an especially good counter, as it replaces the rain, and has ridiculously high Special Defense, which eliminates all offensive presence that Poli has. Another good counter is Mega Venusaur, as it can survive a Scald or an Ice Beam, is immune to Toxic, and then KO with Giga Drain.
Any Additional Info: Politoed will have to switch in several times throughout a battle, so it's important to keep him as healthy as possible and clear of status, so keep that in mind when building your team.