Alakazam-Mega @ Alakazite  
Ability: Trace  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psychic  
- Focus Blast  
- Shadow Ball  
- Recover  

Tangrowth @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
- Power Whip  
- Knock Off  
- Hidden Power [Ice]  
- Earthquake  

Heatran @ Leftovers  
Ability: Flash Fire  
Shiny: Yes  
EVs: 128 HP / 132 SpD / 248 Spe  
Calm Nature  
IVs: 0 Atk  
- Lava Plume  
- Earth Power  
- Taunt  
- Stealth Rock  

Zapdos @ Leftovers / Electrium Z
Ability: Static  
EVs: 248 HP / 240 Def / 20 Spe  
Bold Nature  
IVs: 0 Atk  
- Volt Switch  
- Heat Wave  
- Defog  
- Roost  

Greninja @ Choice Scarf
Ability: Protean
EVs: 176 Atk / 80 SpA / 252 Spe
Hasty Nature
- Rock Slide
- U-turn
- Ice Beam
- Spikes

Tapu Lele @ Fightinium Z  
Ability: Psychic Surge  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psyshock  
- Moonblast  
- Focus Blast  
- Calm Mind

or 

Tapu Lele @ Choice Specs
Ability: Psychic Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Psychic
- Moonblast
- Psyshock
- Hidden Power Fire