Kill thunderbugs. They sometimes drop a shiny. That's basically like a carve. You will get Monster Juice/Broth/Essence, or thunderbug Juice/Jelly, depending on if it is Low Rank, High Rank, or G-Rank. I hope this helps ^^
(They are mostly found in the Tower, and for High Rankss they can be found in the Jungle. Correct me if I'm wrong fellas and lady-fellas)