This is a team I put together on Showdown to test out before using it in game. I started with the Polteageist Shell Smash set, and I knew I wanted to use Psychic Terrain in order to deal more damage with Stored Power and protect myself from priority moves like Sucker Punch. The rest of the team I based off of Psychic Terrain, and consequently I made a team that is mostly monotype Psychic. The team doesn't have to be all Psychic, but I wasn't sure what else would synergize well with Psychic Terrain. So far I haven't done very well battling on Showdown, but I'm not sure what to change to improve my team because I'm not an experienced battler.
Here is the team:
Polteageist @ Focus Sash
Ability: Weak Armor
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Shell Smash
- Stored Power
- Shadow Ball
- Baton Pass
Musharna @ Leftovers
Ability: Synchronize
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
IVs: 0 Atk
- Psychic Terrain
- Moonblast
- Energy Ball
- Moonlight
Rapidash-Galar @ Choice Band
Ability: Pastel Veil
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Play Rough
- Wild Charge
- Throat Chop
- Zen Headbutt
Claydol @ Light Clay
Ability: Levitate
Happiness: 160
EVs: 252 HP / 4 Def / 252 SpD
Careful Nature
IVs: 0 Atk
- Light Screen
- Reflect
- Rapid Spin
- Stealth Rock
Hawlucha @ Psychic Seed
Ability: Unburden
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- High Jump Kick
- Acrobatics
- Stone Edge
- Swords Dance
Indeedee-F (F) @ Terrain Extender
Ability: Psychic Surge
EVs: 252 HP / 4 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Psychic
- Aromatherapy
- Healing Wish
- Dazzling Gleam
EDIT: Switched out Bronzong for HA Indeedee-F and Malamar for Psychic Seed Unburden Hawlucha