Daimyo Hermitaur, Barroth, Agnaktor/Glacial Agnaktor, Gammoth, Nakarkos.
Barroth, Zinogre/Stigyan Zinogre.
Like how attacking Barroth with water attacks washes off it's mud armor, changing it's resistances? or how Fire Damage, though doing little damage to an Agnaktor, softens it's lava...