RMT/ suggestions please

Death Egg (Tapu Lele) @ Leftovers
Ability: Psychic Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Psyshock
- Focus Blast
- Thunderbolt

Zombiie (Toxapex) (M) @ Black Sludge
Ability: Regenerator
Shiny: Yes
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Scald
- Haze
- Toxic Spikes
- Recover

Toa (Venusaur-Mega) (M) @ Venusaurite
Ability: Thick Fat
Shiny: Yes
EVs: 252 HP / 72 Def / 80 SpA / 104 SpD
Calm Nature
IVs: 0 Atk
- Giga Drain
- Sludge Bomb
- Hidden Power [Fire]
- Leech Seed

Lagann (Excadrill) (M) @ Choice Scarf
Ability: Mold Breaker
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Iron Head
- Rock Slide
- Rapid Spin

Railgun (Zapdos) @ Leftovers
Ability: Static
Shiny: Yes
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Thunderbolt
- Heat Wave
- Defog
- Roost