Much like the Victreebel set I designed for my OU Sunny Day team, (which was later posted by LR in the Peer Edit Analysis section, with minor alterations to Speed), this set uses 2 Attacks, Swords Dance and Hidden Power to great success.
I also used this Tangrowth on my OU Sunny Day team as a back-up Mixed sweeper when Victreebel died, and it works great to lure in Heatran, Skarmary, Scizor, Jirachi, and of course, Bronzong.
http://www.smogon.com/dp/pokemon/tangrowth
[SET]
name: Chlorophyll Mix Sweeper
move 1: Swords Dance
move 2: Power Whip
move 3: Earthquake
move 4: Hidden Power Fire / Ice
item: Life Orb
nature: (+ SpA, - SpD)
evs: 252 Atk / 4 SpA / 252 Spe [8 SpA / 248 Spe for Hidden Power Ice]
ivs: 29 HP
[SET COMMENTS]
<p>This set is designed for use on Sunny Day teams, where Tangrowth will still need max EV Speed investment to outspeed Base 130s, while keeping a nature that boosts its very high Special Attack. While many would expect Tangrowth to use more than 1 Special Attack with such a high Special Attack stat, Tangrowth is better using its Attack stat thanks to Swords Dance, which Tangrowth can find time doing thanks to its strong Defense and HP, which isn't always easy for Victreebel.</p>
<p>Power Whip and Earthquake are Tangrowth's main attacking moves. While Tangrowth has a lower Attack stat and less EVs invested in Attack compared to Mixed Victreebel, Power Whip has a much stronger base power compared to Leaf Blade to make up for that. This difference in power is amplified more when dealing Super Effective damage [making the base power gap increase enough to overpower max Attack Adamant Victreebel's Leaf Blade], and is especially helpful when dealing with Suicune, Tyranitar, etc. Again, just like the Electivire's Thunder Punch or Thunderbolt dilema, many were surprised to learn that base power more than makes up for lower offense stats.</p>
<p>Hidden Power Fire is used in the last slot to give Tangrowth the coverage it needs to beat the Steel-types that resist its other moves, namely Scizor, Bronzong, Skarmary, and those with a higher Defense such as Metagross, while Earthquake hits the Heatran, Infernape, and Empoleons that seem to not mind Tangrowth's other attacks. On the other hand, Hidden Power Ice will take out the odd Dragonite, Gliscor, Flygon, and Salamence, but that will leave Tangrowth unable to fend itself off from its more common counters. Additionally, Gliscor and Flygon will still take nuetral damage from Power Whip, and after a Swords Dance, that will 1HKO-2HKO both said Pokemon.</p>
<p>Attack is maxed to give Tangrowth as strong a Power Whip as possible. 252 Speed EVs give it a stat of 198 [factoring Hidden Power Fire's drop in Speed], which allows Tangrowth to outspeed scarfed Modest Heatran and Lucario in the sunlight, and Scizor, Rhyperior, and Cresselia outside of it. The remaining EVs and nature are allocated to Special Attack to power up the Hidden Power. With the listed EVs, Tangrowth will 2HKO max HP Metagross on average with Stealth Rock support, and with Hidden Power Fire in the sun, always OHKO max HP Skarmory with Stealth Rock. 29 HP ivs are to give Tangrowth a HP ending in 9, so Tangrowth has 11 turns to sweep with Life Orb rather than 10.</p>
***YAY MY 410 Post!***