I have no idea why Drizzle+Swift Swim is banned, I would like to know the answer as well.
Drizzle and Swift Swim combo is only banned on Smogon and not where else. Smogon also banned Blaziken with Speed boost. I have been battling in a lot of places with different rules and found out that Smogon is the only place which banned it because they are rain weak and most of the their team cannot counter Pokémon with Swift Swim. Well beating one of their Co-ordinator 5-0 and 1-0 with the same team twice didnt look Good on them so they found a lot of reasons to ban it.
The team I used with Politoed are as followed:
DiscoToad (Politoed) (F) @ Leftovers
Trait: Drizzle
EVs: 252 HP / 192 Def / 52 SAtk / 12 SDef
Relaxed Nature (+Def, -Spd)
- Scald
- Ice Beam
- Focus Blast
- Toxic
You may have noticed that this Politoed is Relaxed nature and -Speed nature. This is because to compete with Tyranitar and Hippowdon as a lead which means that if you are slower your ability gets activated last which is a good thing is this case making their Sand Stream go first and than you wash it out with Drizzle and you get the Special Type Attack Bonus[STAB] with 50% extra boost with with the rain up when you use Scald and a chance to burn their Pokémon while you are at it.With Ice Beam it is just to hit hard Grass, Dragon, Flying etc type Pokémon with a chance of Freezing with that extra EV points on Sp.Atk. The Focus Blast is for Normal, Dark, Steel type and Bulky Water type which normally resist Ice and Water moves, So you just wear down their HP with Toxic(increased to 90% accuracy) and than attack them.
Muhahaha (Cloyster) (F) @ Focus Sash
Trait: Skill Link
EVs: 252 Atk / 4 SAtk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Shell Smash
- Icicle Spear
- Rapid Spin
- Rock Blast
Rapid Spin is the most useful one down here since it gets rid of Stealth Rock, Spikes and Toxic Spikes which are harmful to this team considering nearly all of them have Focus Sash and 5 of them use the move Shell Smash which Lowers Defense and Special Defense of the User by one Stage(50%)and Increase Their Attack, Special Attack and Speed by 2 Stages(100%). With Focus Sash it helps you survive any one none repetitive moves while at Full HP. By the way in Pokémon Black and White the ability Sturdy works same way as focus Sash does, which is the reason why I gave Crustle Leftovers not Focus Sash. Cloyster Also works Great in Drought, Snow Warning(being Ice and Water type Pokémon) and Drizzle since none of its move is affected by this Condition.
VeryFast (Gorebyss) (F) @ Focus Sash
Trait: Swift Swim
EVs: 4 HP / 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Shell Smash
- Hidden Power [Grass]
- Surf
- Ice Beam
This one is Water Base and HP Grass to take deal damage to Water type, Ground Ice Beam is just for General Over heads and for Coverage while Surf is for more accurate and STAB. Shell Smash and Focus Sash Same reason as Cloyster.
Oh Mastar! (Omastar) (M) @ Focus Sash
Trait: Swift Swim
EVs: 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Shell Smash
- Hydro Pump
- Ice Beam
- Earth Power
There is the Fun one. With One Shell Smash while rain is on the field, you are able to 2 hit Blissey and Chansey the Special Walls with HYDRO PUMP!!!! Omastar is also useful in Sand Stream(being a Rock Water Type and gets 50% Sp.def Boost from Sand Storm which gets it's Sp.Def back to normal after one Shell Smash) Earth Power is for Electric and Steal Coverage plus general over heads(For more accuracy against Rock and Ground type if you don't want to risk Hydro Pump missing against them)
Drug User (Crustle) (F) @ Leftovers
Trait: Sturdy
EVs: 4 HP / 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- X-Scissor
- Shadow Claw/Aeriel Ace
- Stone Edge
- Shell Smash
It's eyes makes it look like it is on Drugs To me That is why I called it Drug User. Well With Aeriel Ace or Shadow Claw is just up to you. But yeah I just wanted more Shell Smash User on my team. And Another Useful Pokémon In Sand Stream with the same reason as Omaster
YoungNFast (Carracosta) (M) @ Focus Sash
Trait: Swift Swim
EVs: 4 HP / 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Aqua Jet
- Waterfall
- Rock Slide/Stone Edge/Earthquake
- Shell Smash
And Finally the old School Carracosta with the Dream World Ability Swift Swim. Aqua Jet is not expected very much with Shell Smash and Swift Swim set, but it is excepted with Curse and Sturdy Set. Aqua Jet being a Priority It is a good thing not to get hurt in by another Pokémon. Rock Slide vs Stone Edge is bassically Power vs Accuracy and Earthquake is for general coverage. Useful Pokémon with the same reason as Omaster.