Question: ptd how to beat cinnabar gym?
Answer: First make sure your 5 Gyarados set up with Dragon Dance, then use Earthquake until every Pokémon except Moltres is defeated. If the Gyarados' health is below half, use a potion. Then when the Moltres is remaining, let the 6th Gyarados use Rain Dance, then make all Gyarados use Thunder.