Speedy SubSeed
Jumpluff@Leftovers
Timid nature
Infiltrator
252 HP/252 Speed/4 Defense
~Substitute
~Leech Seed
~Toxic
~Protect
Your standard Jumpluff, really. Jumpluff is a cool concept, and I like it a lot. That Ice weakness, though, that does it no favors. But yeah- Substitute helps you live, Leech Seed heals back the Substitute damage, Toxic tacks on more damage, and Protect gives the damage more time to pile up. Not too complicated.
Item heals Jumpluff. Ability helps bypass enemy Substitutes.
Something Somethingn Swords Dance
Jumpluff@Sitrus Berry/Focus Sash
Jolly nature
Infiltrator
252 Attack/252 Speedf/4 HP
~Swords Dance
~Seed Bomb
~Acrobatics
~Return/U-turn
This... is waaaaay more situational than the SubSeed set. By far. This set takes advantage of Jumpluff's amazing Speed, physical STAB moves, and access to Swords Dance by turning it into a surprise sweeper. Swords Dance buffs your Attack to actually usable levels. Seed Bomb is STAB. Acrobatics is STAB. Return is coverage. U-turn is an alternate option, but considering you'll lose the Attack buff by switching out... well, it's your call, really.
Item is meant to be consumed to trigger Acrobatics. Ability means Substitutes and Reflects are no match for you.
Other options:
*Jumpluff gets an interesting option in Memento. Lets it go out with a bang, crippling the enemy in the process. You think Jumpluff needs a move like that, then by all means.
*Infestation, I suppose, is an option for the SubSeed set, make sure they can't switch out of the Leech Seed while adding on to the residual damage.
*Jumpluff also gets Aromatherapy, if your team needs something like that.
Abilities:
*Chlorophyll: Jumpluff's Speed is doubled in bright sunlight. Generally a good Ability, but Jumpluff can generally hold its own in terms of Speed.
*Leaf Guard: During bright sunlight, Jumpluff is immune to status conditions. Unlike Hydration, this won't heal Jumpluff of status at the end of every turn- it's more like Safeguard... Jumpluff has better options.
*Infiltrator: Jumpluff's Hidden Ability. Jumpluff's attacks are not blocked or hindered by Reflect, Light Screen, Safeguard, or Substitute. This is what I'd shoot for on a Jumpluff, personally. Normally a Substitute on the other side would render a SubSeed set useless, but not with Infiltrator! It's an all-around good Ability.
Partners:
You'll want stuff that can take Ice moves, because that's what Jumpluff will be drawing in. And if you opt for any Ability other than Infiltrator, it's a good idea to be packing a Ninetales.
Counters:
Cloyster's Icicle Spear destroys the SubSeed set. Ice Shard in general spells doom for Jumpluff. Basically, plan for Jumpluff like you would've planned for Dragon-types pre-Generation VI.
Opinion:
I like Jumpluff. Cool design. Attacking stats disappoint, especially for in-game use, but it's quite good at what it does.
Prediction for next week:
Flareon