Instructions
Focus your attacks on Wigglytuff. Eliminating Wigglytuff's minions decrease the amount of damage that you take each turn, but the battle ends immediately when you defeat Wigglytuff. Focusing your firepower on the Pokemon take much less turns than defeating her minions at the beginning of the match.
Attack Wigglytuff with a Fighting Type Pokemon. Wigglytuff is Normal Type Pokemon who is extremely weak to Fighting Type Pokemon, such as Machop. This will decrease Wigglytuff's large amount of HP very quickly.
Use revive seeds to bring back your fainted Pokemon. Revive seeds can be purchased from a handful of Pokemarts and instantly revives a fallen Pokemon, albeit not at full health. If you only have one Fighting Type Pokemon, you can keep inflicting maximum damage on the Pokemon.