Information about pokemon in skyblock?

I was wondering if I could get information on Rhyhorn and the geodude "tree," mainly because I want to make an automatic Rhyhorn gen using only pokemon.

Rhyhorn
Is there a way to extract the inventory into a chest automatically?
If not, will there be in the future?

Geodude(More like Golem)
What is Golem's coverage for placing cobblegen blocks?

I have tried using a hopper right under the rhyhorn, but that did not work for me. If this is a bug, please say so I know. I want to use hoppers because the rhyhorn's inventory would fill within around 3-5 minutes using only 6 geodudes.

 

There is no current way to automatically extract the items out of a rhyorns inventory.
As for golems coverage I don't know exactly, however I recommend just using a ryhorn for your automatic generators
You can do this by creating a box which is basically one big cobble generator, you can make this 14x13x14.
Make sure that when you use lava to build such a generator that each block needs to be source lava.