>>18563741Dugtrio
Ability: Arena Trap
Nature: Jolly
Item: Hard Stone
Moves: Earthquake, Stone Edge, Hone Claws,
Stealth Rock
EVs: 252 Spe, 252 Atk, 4HP
Espeon
Ability: Magic Bounce
Nature: Modest
Item: Expert Belt
Moves: Dazzling Gleam, Psyshock, Toxic, Shadow Ball
EVs: 252 Spe, 252 Sp.Atk, 4 HP
Delphox
Ability: Most likely blaze
Item: Not sure yet
Nature: Timid
Moves: Psyshock, Shadow Ball, Flamethrower, (unsure about last move)
EVs: 252 Spe, 252 Sp.Atk, 4 Sp.Def
Rotom Wash
Item: Leftovers
Ability: Levitate
Nature: Modest
Moves: Will-o-wisp, Hydro Pump, Confuse Ray, Volt Switch
EVs: 248HP, 76 Def, 184 Sp.Def
Hawlucha
Item: Sitrus Berry
Ability: Unburden
Moves: Flying Press, Bulk Up, Power up Punch, U-turn
Not sure what to add as sixth pokemon, probably a mega. I also wanted to cover as much weaknesses as possible.