You'll need Erika's Jigglypuff as Active
Poke'mon and have Doduo on your Bench. First, you use Pulled Punch for 40
first turn with Double Colorless Energy, then next turn, evolve Doduo into
Dodrio, retreat Erika's Jigglypuff for free and use any other
Poke'mon(Electabuzz, for example) to finish off the job!
UltraMaster64