There are only where Shiny Beetles spawn consistently:
The Shiny Beetle is a "Rare 4" insect used frequently for upgrading weapons and crafting armor sets during the transition from Low Rank to High Rank. monster hunter generations ultimate shiny beetle location
Focus your search on Areas 1, 6, and 8 . You can often gather over 10 beetles in a single run here if you use a Harvest Tour . There are only where Shiny Beetles spawn consistently:
Do not take a slay quest. Take the (Hub G-Rank 3 star). This quest has no time limit, no monsters to kill (until a Deviljho invades, but just run away), and you can end via the "Return from Quest" option (not Abandon) to keep all your items. but just run away)