Learnability. Known Pokémon that can learn Fissure naturally include Barboach, Camerupt, Diglett, Drilbur, Dugtrio, Excadrill, Flygon, Groudon, Hippopotas, Hippowdon, Landorus, Sandy Cloak Wormadam, Stunfisk, Trapinch, Vibrava and Whiscash.