I have a team based around Tapu Fini and using her to boost Gastrodon with its Storm Drain, I have Volcarona to eliminate Grass-type threats against the two of them, and I have Raichu with his Lightning rod to draw away Electric attacks from Tapu Fini. I'm still getting wrecked, some criticism would be appreciated.
Gastrodon @ Sitrus Berry
Ability: Storm Drain
EVs: 248 HP / 8 Def / 252 SpD
Sassy Nature
- Scald
- Recover
- Toxic
- Earthquake
Volcarona @ Firium Z
Ability: Flame Body
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Heat Wave
- Giga Drain
- Quiver Dance
- Protect
Tapu Fini @ Aguav Berry
Ability: Misty Surge
Level: 50
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Calm Mind
- Dazzling Gleam
- Surf
- Protect
Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 252 HP / 36 Atk / 76 Def / 140 SpD
Relaxed Nature
IVs: 0 Spe
- Gyro Ball
- Power Whip
- Leech Seed
- Protect
Lucario @ Lucarionite
Ability: Inner Focus
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Close Combat
- Bullet Punch
- Iron Tail
- Swords Dance
Raichu @ Focus Sash
Ability: Lightning Rod
Level: 50
EVs: 4 Atk / 252 SpA / 252 Spe
Timid Nature
- Fake Out
- Thunderbolt
- Protect
- Hidden Power [Ice]
Gastrodon @ Sitrus Berry
Ability: Storm Drain
EVs: 248 HP / 8 Def / 252 SpD
Sassy Nature
- Scald
- Recover
- Toxic
- Earthquake
Volcarona @ Firium Z
Ability: Flame Body
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Heat Wave
- Giga Drain
- Quiver Dance
- Protect
Tapu Fini @ Aguav Berry
Ability: Misty Surge
Level: 50
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Calm Mind
- Dazzling Gleam
- Surf
- Protect
Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 252 HP / 36 Atk / 76 Def / 140 SpD
Relaxed Nature
IVs: 0 Spe
- Gyro Ball
- Power Whip
- Leech Seed
- Protect
Lucario @ Lucarionite
Ability: Inner Focus
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Close Combat
- Bullet Punch
- Iron Tail
- Swords Dance
Raichu @ Focus Sash
Ability: Lightning Rod
Level: 50
EVs: 4 Atk / 252 SpA / 252 Spe
Timid Nature
- Fake Out
- Thunderbolt
- Protect
- Hidden Power [Ice]