Well, I recommend Tapu Koko as an electric surge setter and pincurchin can be there in case tapu koko faints.
Tapu Koko@ Life Orb
Ability: Electric Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Dazzling Gleam
- Grass Knot
- Thunder Wave
Tapu Koko can be used as a sweeper itself. First you can Thunder Wave, then Volt Switch to Alolan Raichu, then set up with nasty plot. Life Orb just gives it enough damage output to OHKO common ground types like Mammoswine and Swampert with Grass knot. Dazzling Gleam is there for Garchomp.
Here is a set for Pincurchin:
Pincurchin@ Terrain Extender
Ability: Electric Surge
EVs: 252 HP / 4 Def / 252 SpA
Modest Nature
IVs: 0 Atk
- Rising Voltage
- Toxic Spikes
- Scald
- Hex
After Thunder Waving, maybe you can switch to Pincurchin and do double damage with Hex or set Toxic Spikes to do double damage with Hex again, Scald for a burn chance, again if getting the burn, Hex will do double damage. Hex is also good against non-normal type pokemon with Guts. Rising Voltage is just the best electric move in Electric Terrain. These two together perform good in battle along with Alolan Raichu.
I would switch out Toxtricity for Tapu Koko.
Some suggestions:
If you really want to use Toxtricity, then here is a set:
Toxtricity @ Throat Spray
Ability: Punk Rock
EVs: 252 HP / 252 SpA / 4 Spe
Modest Nature
IVs: 0 Atk
- Overdrive
- Hyper Voice/Boomburst
- Snarl/Shift Gear
- Sludge Bomb/Sludge Wave
For dracozolt:
Dracozolt @ Choice Scarf
Ability: Volt Absorb
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Bolt Beak
- Outrage
- Aerial Ace/Earthquake/Rock Slide
- Low Kick
Choice Scarf lets it outspeed many other fast pokemon, and doing double damage with Bolt Beak.
Also Low Kick is for Rock Pokemon, and also for Max Knuckle when Dynamaxed, same with Max Airstream/Aerial Ace. Aerial Ace is quite a weak move, so you might as well replace it with Earthquake or Rock Slide.
For Zapdos, Tailwind isn't necessary as You already have fast attackers in Dracozolt and Alolan Raichu.
You can replace that with roost.
Overall this is a really good team. These are suggestions to make it even more successful in battle.