Jellitran.

Jellicent @ Leftovers
Ability: Water Absorb
EVs: 252 HP / 200 Def / 12 SpD / 44 Spe
Bold Nature
- Taunt
- Recover
- Scald
- Will-O-Wisp

Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 HP / 180 SpD / 76 Spe
Calm Nature
- Stealth Rock
- Roar
- Lava Plume
- Earth Power

Venusaur-Mega @ Venusaurite
Ability: Thick Fat
EVs: 232 HP / 240 Def / 36 Spe
Bold Nature
- Giga Drain
- Sludge Bomb
- Hidden Power [Fire]
- Synthesis

Mandibuzz (F) @ Rocky Helmet
Ability: Overcoat
EVs: 248 HP / 8 Atk / 252 Def
Impish Nature
- Roost
- Foul Play
- Knock Off
- Defog

Hippowdon @ Leftovers
Ability: Sand Stream
EVs: 252 HP / 200 Def / 56 SpD
Impish Nature
- Earthquake
- Whirlwind
- Ice Fang
- Slack Off

Chansey (F) @ Eviolite
Ability: Natural Cure
EVs: 4 HP / 252 Def / 252 SpD
Bold Nature
IVs: 0 Atk
- Wish
- Soft-Boiled
- Seismic Toss
- Toxic