Lanturn - holding expert belt
Ability: Volt absorb
Nature: Adamant
iv's: Best atk, Best hp, spd, def, sp.def
ev's: 252 atk, 252 hp, 4 spd
Moves: Charge, Return, Soak, Ion deluge
Swellow - holding flame orb
Ability: Guts
Nature: Adamant
iv's: Best atk, Best hp, Best spd, def, sp.def
ev's: 252 atk, 252 hp, 4 spd
Moves: Toxic, Facade, Roost, Thief
With Lanturn, using Ion deluge and soak with return can do huge damage plus using charge to make it do even more damage, then with swellow having ion deluge to make Facade an electric type move and soak then making it super effective plus having the guts and toxic boost will also do massive damage. Roost is there to heal from the flame orb and Theif is there just cuz, but you can use whatever you want.