May 10, 2015, 07:17 PM
Take a look at Charizard X's weaknesses and cover those weaknesses with other Pokémon. For example, Landorus-T's Stone Edge/Rock Slide gives Charizard a lot of trouble so include a Pokémon that knows an Ice-type move to deal with it. Then whatever Pokémon you choose to cover Charizard's weaknesses, pick Pokémon that cover those Pokémon's weaknesses and so on.