2 ghost pokemon (preferably Haunter or Gengar) Shadow ball.
1 poison pokemon (Nidoqueen Nidoking) helping head, fighting attacks and poison sting.
1 psychic pokemon (Alakazam ) psychic.
1 Flying pokemon (Pidgeotto) whirl wind.
1 grass type pokemon (Venausaur) Leech seed.
First to slots belong to the ghost types, then after the grass type pokemon, then the poison type pokemon and at the end, put pidgeotto at the end. don't let him get hit by any pokemon. Use potions when necessary. Charizard with earthquake will also help.
|Golbat (1 to 5)|
|Psychic||Reflect Type||Psychic/Bulldoze||Reflect Type|
|Light Screen||Recover||Light Screen||Rest|