
http://www.smogon.com/rs/pokemon/seadra
[Overview]
Seadra sports great Speed and Special Attack stats for a Water-type in NU, and it doesn't need rain support to be an immediate threat. It's very one-dimensional, but a decent choice for high offense teams. Most other Water-types in the tier are too weak, too slow, or need setup to be useful, and Seadra is just good right off the bat. However, it's relatively easy to wall and has no way of breaking its usual counters, as it doesn't have a way of boosting its attacks outside of Rain Dance, which doesn't give it a Speed boost, unlike its main competition in Huntail. All in all, Seadra is a great choice, just make sure Huntail isn't a better choice for your team.
[SET]
name: Special Attacker
move 1: Hydro Pump / Surf
move 2: Ice Beam
move 3: Hidden Power Grass / Hidden Power Electric
move 4: Substitute / Toxic
item: Leftovers
ability: Poison Point
nature: Timid
evs: 4 HP / 252 SpA / 252 Spe
[SET COMMENTS]
This set is a good choice for hyper offense teams that can continually pummel the opponent without the need for setup. While Huntail is more powerful and faster in rain, Seadra does not need to rely on rain being active in order to outspeed a huge portion of the metagame and blast foes with its STAB move, making it a bit more reliable in that regard. The choice between Hydro Pump and Surf is the age-old story of power vs accuracy. Hydro Pump is generally preferred due to the chance to break through defensive stalwarts like Swalot and Lickitung; however, the tier is pretty specially frail on the whole, making Surf a decent option.
Ice Beam and either Hidden Power Grass or Hidden Power Electric give Seadra almost perfect neutral coverage on the tier, which Seadra is thankful for because it really does not have a movepool outside of that, making the last slot somewhat of a filler option. Substitute is nice to protect Seadra from being revenge killed by the likes of Plusle and Haunter, and it can be used with a Petaya or Salac Berry to give Seadra an extra boost to possibly sweep the opposing team. Toxic on the other hand is a great way to cripple the special walls that can tank its attacks well, particularly Kecleon and Bellossom.
[ADDITIONAL COMMENTS]
A Timid nature is needed to let Seadra outspeed Glalie and the rare Fire-types that sit near its Speed tier, like Charmeleon and Magby. Modest is still a choice though if you're looking for straight power and is recommended if you're using Hydro Pump. Hidden Power Grass can be used over Hidden Power Electric to nail Whiscash, but Electric is generally better, as it provides better neutral coverage and has a more desirable super effective hit on Pelipper.
Spikes is central to hyper offense teams, making Roselia, Glalie, and Cacturne required teammates, with Roselia in particular sporting great type synergy with Seadra. Bellossom is a huge threat to this set, as it is tanky enough to withstand Ice Beam and easily OHKOes Seadra with any of its STAB moves. Flying-types like Murkrow and Fire-types like Flareon are thus good offensive teammates to pair with Seadra, as they can take advantage of Bellossom and OHKO it, and in Flareon's case, enjoy a nice Sunny Day boost as well should Bellossom choose to set up. Plusle and Haunter are the main revenge killers to watch out for when using this set, making a special tank a recommended teammate; Chimecho is a good team choice, as it can continue to pressure the opponent with offensive Calm Mind sets. Finally, Hitmonchan is a great offensive partner to blow through a few of the special walls that stand in Seadra's way, while Seadra soaks the physical walls that give Hitmonchan some trouble.
[Other Options]
There really isn't much more for Seadra to do, as its movepool is pretty barren. Rain Dance is an option to boost its STAB attacks and form a dual-sweeping core with Huntail. Agility allows Seadra to outspeed the entire tier at +2 and remove the possibility of Plusle and Haunter easily revenge killing it. Finally, Blizzard offers more power than Ice Beam and can make Bellossom a more risky switch-in to Seadra, but the accuracy just kills it as a reliable option.
[Checks and Counters]
Specially defensive Bellossom is probably the best answer to Seadra available, as it can withstand an Ice Beam or two and proceed to OHKO Seadra back with any of its STAB moves. Dewgong is the next best answer, as it is avoids the 3HKO from Hidden Power and can proceed to 2HKO back if it's carrying its own Hidden Power or 3HKO with Surf or Ice Beam. Specially defensive Lickitung, Swalot, and Kecleon are the next best answers, as they are not threatened by a 2HKO from any of Seadra's moves and can proceed to stall it out. Finally, Seadra is relatively easily revenge killed by most Pokemon with neutral or super effective special attacks. Plusle and Haunter both outspeed Seadra and OHKO with Thunderbolt. Roselia can tank an Ice Beam and OHKO with Giga Drain. Maximum Special Attack Chimecho can easily OHKO with Hidden Power Electric and tank a Hydro Pump.
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