Check please

Quagsire @ Leftovers
Ability: Unaware
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Toxic
- Recover
- Scald
- Earthquake

Venusaur-Mega @ Venusaurite
Ability: Thick Fat
EVs: 252 HP / 104 Def / 152 SpD
Bold Nature
IVs: 0 Atk
- Sludge Bomb
- Sleep Powder
- Synthesis
- Giga Drain

Heatran @ Firium Z
Ability: Flash Fire
EVs: 252 HP / 4 SpA / 252 SpD
Calm Nature
IVs: 0 Atk
- Magma Storm
- Taunt
- Toxic
- Earth Power

Klefki @ Leftovers
Ability: Prankster
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
IVs: 0 Atk
- Thunder Wave
- Spikes
- Defog
- Dazzling Gleam

Chansey @ Eviolite
Ability: Natural Cure
EVs: 200 HP / 252 Def / 56 SpD
Bold Nature
IVs: 0 Atk
- Seismic Toss
- Stealth Rock
- Toxic
- Soft-Boiled

Umbreon @ Leftovers
Ability: Synchronize
EVs: 252 HP / 106 Def / 150 SpD
Bold Nature
IVs: 0 Atk
- Protect
- Wish
- Heal Bell
- Foul Play