Not necessarily true. Empoleon, Swampert, Roserade, Hippowdon, Aerodactyl, Jirachi, Dragonite, Starmie, Weavile, Infernape, Machamp, Ninjask, Gyarados, Crobat, Celebi, Gliscor, and many other common leads do not even have the ability to explode, but they are so commonly used nonetheless. Some...