Dwebble fight over the best shell rocks. Their natural habitats don’t usually have gemstones, but Dwebble go crazy when there is one around. Career contest judges say a Gem Dwebble is even more prestigious than a shiny one.

There aren’t enough boulders in deserts to sustain large Crustle populations, so they migrate to mountains after evolution. There’s plenty of rock in this new environment, but a new risk comes from Fighting-Types wanting to shatter Crustle’s shell as training.