5th Team Member for my OU Team?

Question

So I have a decent enough (I hope) OU Team, but it's missing a team member and I need help! The new team member should be:
- a special attacker
- fairly strong
- should have good synergy with the rest of the team
- not use the same item as one of the other Pokemon
Can you please post movesets, and why I should use it.

Team

Lopunny-Mega (F) @ Lopunnite
Ability: Limber
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Fake Out
- High Jump Kick
- Thunder Punch
- Ice Punch

Gekkouga (Greninja-Ash) @ Choice Specs
Ability: Battle Bond
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Scald
- Dark Pulse
- Ice Beam
- U-turn

Landorus-Therian @ Leftovers
Ability: Intimidate
Shiny: Yes
EVs: 4 HP / 252 Atk / 252 Spe
- Stealth Rock
- Defog
- Earthquake
- U-turn

Tapu Lele @ Psychium Z
Ability: Psychic Surge
EVs: 252 HP / 252 SpA / 4 Spe
IVs: 0 Atk
- Psyshock
- Moonblast
- Thunderbolt
- Shadow Ball

Ferrothorn @ Rocky Helmet
Ability: Iron Barbs
EVs: 252 HP / 20 Atk / 236 SpD
Relaxed Nature
IVs: 0 Spe
- Leech Seed
- Protect
- Gyro Ball
- Knock Off

Answer 1

Heatran @ Firium Z
Ability: Flash Fire
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
- Magma Storm
- Earth Power
- Taunt
- Toxic

This Heatran is used as a Z-Move trapper. First, you switch in and use Magma Storm to trap them and deal damage overtime, then you use Inferno Overdrive and not fear them reacting and switching out to make it less effective. 252 SpA EVs and Spe EVs, Flash Fire, and a Modest Nature will ensure that you trap the other side’s Pokémon and deal maximum amount of damage. Earth Power is used as a secondary attack in case the Z-Move or Magma Storm is not effective, Taunt will ensure that they don’t take advantage of healing or other effects while Magma Storm is in effect, and Toxic will further amplify the damage overtime that Magma Storm does.

Also quick note, if you don’t like using 2 Z-Crystals, just switch out Tapu Lele’s Psychium Z with Pixie Plate. :)

Comments

One special defense boost is pretty useless to Tapu Lele. Pixie plate is better.

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I'd rather not use a single-use item on a Pokemon - if I switch out (which I do a lot), I'll lose the boost from Psychic Seed! But, I like the idea of heatran, do you have any suggestions for non-Z-move Heatran?

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Use this Heatran:

Heatran @ Choice Scarf  
Ability: Flash Fire  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Earth Power  
- Hidden Power [Ice]  
- Flamethrower  
- Flash Cannon

252 SpA Heatran Hidden Power Ice vs. 0 HP / 4 SpD Landorus-Therian: 316-372 (99 - 116.6%) -- 87.5% chance to OHKO

If you use Modest, you get a Garenteed OHKO on most Landorus-T, but Heatran needs Timid to out-speed and 2HKO non-defensive Tapu Koko. :P

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@staka ok, is it ok for me to use two choiced pokemon (ash gren has specs)?

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If you can handle 2 Choice items. You shouldn't have more than 2 Choice Items unless you run a Hyper Offense team, and even then, you should still keep it below 4. :P

I forgot to mention, Heatran is an interesting Choice Scarf user because it is more of a less expected surprise because more people expect Blacephalon.  You could use Blacephalon instead, but Heatran is more likely to survive a priority hit and can't be poisoned. :P

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Oh ok, I like the idea of blacephalon, what kind of moveset do you suggest? Preferably one with Taunt (if blace gets it)