>>39819036>I mean it would be acceptable if it didnt straight up look like it was built by humans.A design based on a hermit crab is one of the times where this is absolutely acceptable. In fact I'd say this is one of the most logical concepts for a regional form/evolution I've seen, even more so than most of Game Freak's own attempts
>Dwebble in Galar are unable to use rocks as shells for whatever reason, so they look for alternatives>They start using old scrapped machine parts that they come across instead, common in the region thanks to its industrial history>Upon evolving into Crustle they start using more complete, fully functional machinery >Regional evolution sees them becoming completely integrated with their shells and outright becoming mechanical themselves 