Maushold team battle!

This is the team is use in the video (paste into pokemon showdown) :

Maushold-Four @ Wide Lens
Ability: Technician
Tera Type: Normal
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Population Bomb
- Crunch
- Tidy Up
- Super Fang

Maushold-Four @ Wide Lens
Ability: Technician
Tera Type: Ghost
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Population Bomb
- Crunch
- Tidy Up
- Tera Blast

Maushold-Four @ Wide Lens
Ability: Technician
Tera Type: Fairy
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Population Bomb
- Crunch
- Tidy Up
- Play Rough

Maushold-Four @ Wide Lens
Ability: Technician
Tera Type: Fighting
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Population Bomb
- Crunch
- Tidy Up
- Tera Blast

Exeggutor @ Sitrus Berry
Ability: Harvest
Tera Type: Grass
EVs: 244 HP / 252 Def / 12 SpA
Bold Nature
IVs: 0 Atk
- Calm Mind
- Giga Drain
- Substitute
- Leech Seed

Regieleki @ Choice Specs
Ability: Transistor
Shiny: Yes
Tera Type: Ice
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Thunderbolt
- Reflect
- Tera Blast