How viable is attacking Whimsicott?

Question

Whimsicott really caught my attention recently. In the past generation, I remember having been an avid user of Prankster SubSeed in OU and Ubers; Whimsicott worked wonder back then, despite her typing. But Generation 6 brought her new toys I didn't see until right now.
Whimsy Cotton Ball is now part of the Fairy-type, which gives her many advantages like STAB on Moonblast, more switch-in opportunities on Dragon-type choice locked Pokemon, newfound resistance to Dark- and Fighting-type attacks as well as neutrality against Bug-type attacks. To top it off, it has access to Infiltrator so screw Substitutes, although Prankster shouldn't be unviable to Encore trap any Pokemon / Tailwind to support the team.
However, all isn't shiny for Whimsicott, for her new typing didn't add much offensive synergy with Grass-/Fairy-types both walled by a simple Fire- or Poison-type Pokemon. Moreover, unlike Serperior for example, she has low special attack base of 77 which she can't boost except with a Life Orb so the damage output remains meager.
As an avaricious user of SubSeed on Whimsicott, I ask: Does Attacking Whimsicott work well?
If the answer is yes, then do provide these information please:

• Decent Partners that share great Synergy offensively
• A good defensive core to back up whimsy cotton ball
• Good Stealth Rock users that share Synergy defensively
• Wallbreakers that pair up well with Whimsicott

Answer 1

To answer your question, no, Whmsicott does not make a goos attacker. As you said it hasn't got the best typing or stats. The only thing it has going for it is Speed. And as for its movepool, well, please excuse me while I go laugh my head off.

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Okay, done. Here's the coverage that Whimsicott gets:

• Hurricane
• Giga Drain
• Energy Ball
• Moonblast
• Dazzling Gleam
• Shadow Ball
• Psychic
• Hidden Power

That's it. That's all of Whimsicott's viable attacking moves. It doesn't get any boosting moves, either. Also, you say that it has Infiltrator to bypass Substitute; well, most Substitute users are fairly bulky, and a base 77 Sp. Attack stat is doing pretty much moot to, well, everything. Whimsicott has one role and one role only: Prankster Tailwind/Encore support, with a bit of Leech Seed thrown in. Sorry to burst your bubble, but attacking Whimsicott is pretty much a no.

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If you did want to use said attacking Whimsicott, I would suggest a hybrid of attacker and support.

Sir Puffington (Whimsicott)@ Life Orb

Ability: Prankster/Infiltrator
EVs: 252 SpA / 252 Spe / 4 Def
Modest Nature
- Moonblast
- Giga Drain
- Leech Seed
- Protect/Tailwind

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Comments

Thank You.

Answer 2

No, but it can make a good coverage/support combo if used correctly

Whimsicott @Focus Sash
Ability: Prankster
EVs: 252 SpA / 252 Spe / 4 Def
Timid Nature
- Moonblast
- Energy Ball
- Tailwind/Trick Room
- U-Turn

Lead with whimsicott to set up Tailwind, then U-Turn out to a different Pokemon. If possible, use coverage on low sp. def Pokemon. Use Trick Room if you plan on using lower speed teammates than the ones I suggest.

For defensive synergy use Toxapex:

Toxapex @Black Sludge
Ability: Regenerator
EVs: 252 HP / 156 Def / 100 SpD
Relaxed Nature
- Toxic Spikes
- Baneful Bunker
- Scald
- Recover

Use scald as STAB and to burn, as well as set up Toxic Spikes, poison physical attackers, and stall with Recover and Black Sludge.

As for stealth rocks, toxic spikes should work well, but if you really want stealth rocks, then:

Gigalith @Weakness Policy
Ability: Sturdy
EVs: 244 HP / 252 Atk / 12 SpD
Brave Nature
- Stealth Rock
- Rock Slide
- Explosion
- Heavy Slam/Superpower

or:

Ferrothorn @Leftovers
Ability: Iron Barbs
EVs: 252 HP / 252 Def / 4 SpD
Relaxed Nature
- Spikes
- Stealth Rock
- Body Press/Power Whip
- Gyro Ball

Ferrothorn is by far the better Pokemon, but it struggles with the same types as Whimsicott does, so it's just up to your preference.

As for wallbreakers, these should go a long way:

Dracovish @Choice Band
Ability: Strong Jaw
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Fishous Rend
- Psychic Fangs
- Crunch
- Ice Fang

and:

Kommo-O @Sitrus Berry
Ability: Overcoat/Bulletproof/Soundproof
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Clanging Scales
- Clangorous Soul
- Aura Sphere
- Flash Cannon/Flamethrower

Both share synergy with Whimsicott, Dracovish's Fishous Rend gets boosted by attacking first, and Kommo-O's mediocre 85 base speed also benefits greatly from Tailwind support.

For the last team slot, you can use whatever you want, but I recommend:

Pelipper @Damp Rock
Ability: Drizzle
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
- Scald/Tailwind
- Hurricane
- Ice Beam
- Hydro Pump

Can be used as a second Tailwind user, freeing up Whimsicott of a slot, as well as setting up rain, which can boost Dracovish's power to obscene levels.