Rillaboom, Sylveon, Raichu-Mega-Y +3 Pokémon Team

Rillaboom @ Leftovers
Ability: Grassy Surge
Level: 50
EVs: 32 HP / 5 Atk / 29 SpD
Adamant Nature
- Wood Hammer
- U-turn
- Grassy Glide
- Fake Out

Sylveon @ Fairy Feather
Ability: Pixilate
Level: 50
EVs: 9 HP / 22 Def / 20 SpA / 15 Spe
Modest Nature
- Hyper Beam
- Hyper Voice
- Quick Attack
- Detect

Raichu-Mega-Y @ Raichunite Y
Ability: No Guard
Level: 50
EVs: 9 HP / 32 SpA / 25 Spe
Timid Nature
- Zap Cannon
- Focus Blast
- Fake Out
- Protect

Arcanine-Hisui @ Focus Sash
Ability: Rock Head
Level: 50
EVs: 2 HP / 32 Atk / 32 Spe
Adamant Nature
- Head Smash
- Flare Blitz
- Extreme Speed
- Protect

Staraptor-Mega @ Staraptite
Ability: Contrary
Level: 50
EVs: 32 HP / 2 Atk / 32 Spe
Jolly Nature
- Close Combat
- Brave Bird
- Protect
- Tailwind

Gholdengo @ Life Orb
Ability: Good as Gold
Level: 50
EVs: 7 HP / 14 Def / 9 SpA / 4 SpD / 32 Spe
Timid Nature
- Protect
- Make It Rain
- Shadow Ball
- Nasty Plot