riskydoodles:

In collaboration with the esteemed Professor Oak, rising star Professor Cedar has put forth a study on variations of Kingler that have been cropping up in the oceans of both Kanto and Hoenn regions. By consuming the molted shells of pokemon crustaceans before molting themselves, Krabby seeking a competitive edge go through drastic changes upon evolution following this pre-molt behaviour. Trainers are also taking advantage of this new information with the creation of the Toxic Dancer variant. By reviving Lileep fossils for their tentacles and shells, ambitious trainers of questionable morality are feeding Lileep molts and grafting their tentacles onto their Krabby. The result being a deadly and visually striking Kingler with less crushing power than the standard Kingler, but a considerable advantage for enfeebling foes and winning top rank beauty contests.