Set the speed IVs to 0. Not on Excadrill or Kyurem.

Kyurem @ Choice Scarf
Trait: Pressure
EVs: 252 SAtk / 4 SDef / 252 Spd
Timid Nature (+Spd, -Atk)
- Draco Meteor
- Dragon Pulse
- Ice Beam
- Focus Blast

Victini @ Charcoal
Trait: Victory Star
EVs: 248 HP / 252 Atk / 8 SDef
Brave Nature (+Atk, -Spd)
- V-create
- Trick Room
- Fusion Bolt
- Will-O-Wisp

Groudon @ Leftovers
Trait: Drought
EVs: 252 HP / 252 Atk / 4 Def
Brave Nature (+Atk, -Spd)
- Stealth Rock
- Swords Dance
- Stone Edge
- Earthquake

Palkia @ Lustrous Orb
Trait: Pressure
EVs: 252 HP / 252 SAtk / 4 SDef
Quiet Nature (+SAtk, -Spd)
- Trick Room
- Spacial Rend
- Fire Blast
- Thunder

Arceus @ Silk Scarf
Trait: Multitype
EVs: 252 HP / 252 Atk / 4 SDef
Brave Nature (+Atk, -Spd)
- Swords Dance
- ExtremeSpeed
- Earthquake
- Overheat

Excadrill (M) @ Leftovers
Trait: Sand Rush
EVs: 176 HP / 80 Atk / 252 SDef
Adamant Nature (+Atk, -SAtk)
- Earthquake
- Rock Slide
- Swords Dance
- Rapid Spin