>>26933884>"A cocoon is a casing spun of silk by many moth caterpillars, and numerous other holometabolous insect larvae as a protective covering for the pupa.">The silky protective case spun by the larvae of some insects and moths in which they metamorphose, the pupa.>an envelope often largely of silk which an insect larva forms about itself and in which it passes the pupa stageGet bent. A cocoon is involved in many metamorphosing insects' pupal phase, but it's by no means universal. Many ant species have pupae both with cocoons and "naked" pupae depending on circumstances, sometimes even in the same nest. A cocoon is specifically when some sort of covering is made to cover the pupa itself. All cocoons are for pupae, but not all pupae have cocoons. I did fuck things up a bit by making it sound like cocooning isn't also when they pupate, so I apologize for that.
And that said, some beetles do appear to make cocoons. Not all though, and Stag beetles themselves don't seem too. They do seem to make a kind of "cell" out of the wood they hide in as pupa, but it's a space, not a covering. The pupa posted above was from a Golden Green Stag Beetle, which is not very Vikavolt like as an adult. The left is a "Cyclommatus mniszechi," which has got the horns but not the colors.
Anyway, OP's image is still shit, yadda yadda, there's a reason gamefreak doesn't listen to chucklefucks on the internet for design tips. Look at that thing: pointlessly keeping colors for no reason, even when most early complete metamorphosis bugs go through larger color changes, if not much more drastic form differences. Not that that final rhinocerous form isn't a fucking tragedy of a bug-type. Charjabug and Vikavolt are great. Looking at the OP again, it even changes Grubbin's own design, turning it into some grinning thing with a kissy face instead of a jagged, vertical mouth and fucking up the mandibles. Denialfags and haters can go increase the salinity of their nearest body of water.