First off is Shroomish. Going to steal Mew's set again. This should give you better EVs and also removes that awful Poisonpowder (WHY??? Toxic would do much betetr. Not like I'm suggesting it, seeing as you have Spore.)
Shroomish (F) @ Toxic Orb
Trait: Poison Heal
EVs: 76 HP / 196 Atk / 236 Spd
Jolly Nature (+Spd, -SAtk)
- Spore
- Swords Dance
- Seed Bomb
- Drain Punch
That Bidoof isn't doing much to help out the team. I would suggest a nice Woobat to replace it. This guy is a great Special Sweeper as long as it is against a foe it can outspeed. When it is against a faster foe then hopefully its decent bulk will allow it to survive and hit back. Its typing supports the team well.
Koromori (M) @ Evolution Stone
Trait: Simple
EVs: 92 Def / 236 SAtk / 180 Spd
Timid Nature (+Spd, -Atk)
- Assist Power
- Calm Mind
- Air Slash
- Charge Beam
I don't see Mantyke lasting long or doing much. So let's replace it with a nice and bulky Frillish. Both the Water typing and the Ghost typing really helps out the team. The choice between Shadow Ball and Hex depends on whether you can rely on getting in a Scald hit or if you think you'd rather start hitting with Shadow Ball right away.
Pururiru (M) @ Evolution Stone
Trait: Cursed Body
EVs: 236 HP / 36 Def / 236 SAtk
Modest Nature (+SAtk, -Atk)
- Boil Over
- Recover
- Ice Beam
- Shadow Ball / Hex
I'd make Chimchar your lead. Then give it this set. The item depends. If you want to make sure to get in Stealth Rock you might want to use Focus Sash. However, after that it is useless. Life Orb gets you more power in your attacks. This might be needed seeing as Chimchar doesn't have incredibly high Attack. Hopefully your opponent will also be using an entry hazard on the same turn if you want to use Stealth Rock. Well, hopefully they use Splash, but I won't count on that ever.
Chimchar (M) @ Life Orb / Focus Sash
Trait: Blaze
EVs: 4 HP / 212 Atk / 84 Def / 4 SDef / 188 Spd
Adamant Nature (+Atk, -SAtk)
- Blaze Kick / Fire Punch
- U-turn
- Stealth Rock
- Fake Out
While Bronzor is a good Pokemon, its use on your team is limited I think. Instead, we can have a nice little Pawniard. Its x4 Fighting weakness is helped by Woobat and Frillish. Woobat also helps out that Ground weakness and Frillish helps out that Fire weakness. I think Pawniard will perfectly round out your team. Brick Break offers more power and is the recommended choice.
Komatana (M) @ Life Orb
Trait: Competitive Spirit
EVs: 236 HP / 236 Atk / 36 Spd
Adamant Nature (+Atk, -SAtk)
- Rock Polish
- Iron Head
- Sucker Punch
- Brick Break / Ankle Sweep
I like Phanphy but in this case I think a Cubone might serve you better. Cubone hits incredibly hard. It might be slow but it has solid bulk.
Cubone (M) @ Thick Club
Trait: Rock Head
EVs: 196 HP / 196 Atk / 76 Def / 36 SDef
Adamant Nature (+Atk, -SAtk)
- Bonemerang
- Fire Punch
- ThunderPunch
- Double-Edge
