getting item

Gaurga tail by cutting guarga's tail (not always work), mane from craving it from guarga or as a reward, (earth crystal + bitterbug= antipetic stone), blood red horn by cutting mononbolos horn, (power seed + ctalyst= demondrug) (demon drug + pale extract= mega demondrug), and I have all kind of items but I never heard of wyvern bone or skull there is wyvern fang or claw. To become a gunner you have to buy either a light or heavy bowgun or a normal bow.

All that he said, but you can get blood red horn by killing damyo hermitaur and break it's shell 2 times. There is no wyvern bone, but ther is wyvern skull shell which is from a damyo hermitaur or a shogun ceanataur. For bone you mite mean eldr dragon bone. Idk

Yeah, what they said. If you just want a regular bone, go on one of the 1-star missions. There's one that lets you gather 99 bones in area 3. I forgot which quest it was though, sorry.