Rate my USUM OU singles team!

Question

Ferrothorn @ Rocky Helmet
Ability: Iron Barbs
EVs: 248 HP / 252 Def / 8 SpD
Bold Nature
- Stealth Rock
- Spikes
- Leech Seed
- Knock Off

Landorus-Therian @ Leftovers
Ability: Intimidate
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Rock Slide
- Earthquake
- Rock Polish
- U-turn

Toxapex @ Black Sludge
Ability: Regenerator
EVs: 4 HP / 252 Def / 252 SpD
Bold Nature
- Scald
- Haze
- Toxic Spikes
- Recover

Celesteela @ Leftovers
Ability: Beast Boost
EVs: 252 HP / 128 Def / 128 SpD
Serious Nature
- Leech Seed
- Protect
- Heavy Slam
- Toxic

Tapu Koko @ Terrain Extender
Ability: Electric Surge
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Hidden Power [Ice]
- U-turn
- Taunt
- Thunder Punch

Medicham-Mega @ Medichamite
Ability: Pure Power
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Fake Out
- High Jump Kick
- Thunder Punch
- Ice Punch

Feel free to suggest any changes that I should make to my team, whether its a change in pokémon, EV spread, or anything in general.
Please also state any flaws I have with this team so I can make improvements.

Comments

This seems pretty solid, but get rid of terrain extender. The only Pokemon here that actually likes the Terrain IS Tapu Koko, which much prefers to have Choice Scarf/Specs or Life Orb. I'd also recommend making Lando defensive, giving it SR and taking SR off Ferro. Giving Ferro too much to do in one team makes it an even bigger target and ensures that it will do even less because of it.

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Good idea, PX. my plan with terrain extender was to use it to boost Mega Medicham's Thunder Punch, but I can totally see how scarf or specs would be a lot more useful. SR on Lando T is a good idea as well.

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Give Ferrothorn a leftovers and 252 HP/4 Def/252 SpD sassy for more bulk. Like what PX said, replace its stealth rock with power whip to spread out the support roles and make Ferrothorn less likely to be setup fodder. Give Landorus 252 Atk/4 SpA/252 Spe hasty to outspeed more stuff and raise special attack slightly. Replace its rock polish and rock slide with stealth rock to lay hazards and ice hidden power to cover grass and flying. Give Toxapex 252 HP/252 Def/4 SpD bold to make up for its low HP. Give Celesteela 252 HP/252 Def/4 SpD relaxed for more bulk. Replace its toxic with flamethrower to cover steel. Give Tapu Koko a choice specs and 4 Atk/252 SpA/252 Spe hasty to take advantage of its better special movepool. Replace its thunder punch with thunderbolt for more power. Give Medicham telepathy to weaken opposing Dittos.

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@sumwun Thanks a lot!

Answer 1

Ferrothorn (see sumwum's comment)

Landorus-Therian - I'm not a rock polish guy. If you must, give it Swords Dance or Knock Off instead of U-turn (you don't wanna lose those boosts!) - If you're not using the Z-move Koko then give this Rockium Z for damage. I prefer scarf (rock polish -> superpower, make it have 252 speed IVs) or setup (replace rock polish with stealth rock)

Toxapex -good

Celesteela - yeah, decent.

Tapu Koko - Terrain Extender isn't useful here. Try one of these:
SPECIAL (change EVs), Life Orb
Taunt
Volt Switch
Hidden Power Ice
Dazzling Gleam/ Grass Knot

PHYSICAL (Flyininium Z)
Wild charge
Brave Bird
Return/Iron Head/U-Turn/Roost
Mirror Move (Z-Move doubles attack)

Medicham - set seems good but bear in mind a 2x effective thunder Punch (let's say, against a manaphy) will go from 75 to 150 essentially. High Jump Kick is 130 but with stab goes to 195 so it's not that useful outside of a strange gyarardos counter. I'd use Bullet Punch for priority, but Zen Headbutt may be useful for stab and coverage.

Comments

U-turn is used to reduce the need to predict switches, as you can use it to switch after you see what the opponent switches to. I'd say this is more necessary than swords dance. Thunder punch on Medicham is used to check Toxapex, which is actually pretty common. Additionally, it's the preferred move to use against Celesteela, despite it being weaker than high jump kick, because Celesteela might use protect.