but you don't have to defeat every type, but every Pokemon. That means you're fighting a fighting type Pokemon (weaknesses: Flying and Psychic), a normal type Pokemon (weaknesses: Fighting) and a grass/dark type Pokemon (weaknesses: Bug, Flying, Fighting, Poison, Ice, Fire [because the typing sums up]) so either way you need to use a Fighting type to defeat Porygon, so you've got Cacturne handled along, and that leaves you with a need of Flying or Psychic type to defeat Mankey. Meditite, Gallade and Medicham which are on those cards I offered, all are Fighting/Psychic so can handle Gin's team all by themselves :)