Psy

Latios @ Choice Scarf
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Defog
- Trick
- Psychic

Slowbro-Mega @ Slowbronite
Ability: Regenerator
EVs: 252 HP / 80 Def / 176 SpD
Bold Nature
IVs: 0 Atk
- Calm Mind
- Scald
- Psyshock
- Slack Off

Jirachi @ Colbur Berry
Ability: Serene Grace
EVs: 252 HP / 196 Def / 60 Spe
Impish Nature
- Stealth Rock
- Iron Head
- Thunder Wave
- U-turn

Mew @ Leftovers
Ability: Synchronize
EVs: 252 HP / 108 SpD / 148 Spe
Timid Nature
IVs: 0 Atk
- Taunt
- Roost
- Volt Switch
- Will-O-Wisp

Victini @ Choice Band
Ability: Victory Star
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- V-create
- Trick
- Bolt Strike
- U-turn

Alakazam @ Focus Sash
Ability: Magic Guard
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Counter
- Shadow Ball/Thunder Wave
- Psychic
- Focus Blast