Other I would like advice with my UU Doubles team

[ThatPlaidGuy]

This is my team and I would like to know what I can do to improve it:

Gigawatt (Raichu-Alola) (M) @ Leftovers
Ability: Surge Surfer
Shiny: Yes
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
IVs: 0 Atk
- Psychic
- Volt Switch
- Discharge
- Toxic

Barry (Beedrill) (M) @ Focus Sash
Ability: Swarm
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Infestation
- Toxic
- U-turn
- Knock Off

Richard (Cradily) (M) @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 4 SpA / 252 SpD
Calm Nature
IVs: 0 Atk
- Giga Drain
- Stealth Rock
- Sludge Bomb
- Toxic

Doge (Granbull) (M) @ Leftovers
Ability: Intimidate
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Toxic
- Play Rough
- Bulk Up
- Close Combat

Frodo (Umbreon) (M) @ Leftovers
Ability: Synchronize
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- Heal Bell
- Toxic
- Sucker Punch
- Sand Attack

Marowak @ Leftovers
Ability: Lightning Rod
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Bonemerang
- Stealth Rock
- Toxic
- Thunder Punch